Culprit behind Oscars Best Picture flub did something he was asked not to do moments before error

Before you go, we thought you'd like these...
Before you go close icon

In the days following the now-infamous Best Picture mishap at Sunday night's Oscars, more information has emerged about how the mistake could've possibly occurred.

PricewaterhouseCoopers, the account firm that has been in charge of the Oscars results for decades, released another statement on the matter on Monday, calling out partner Brian Cullinan as the culprit behind the flub.

SEE ALSO: 'Jimmy Kimmel Live' announces Trump-free episode after politically charged Oscars monologue

"PwC Partner Brian Cullinan mistakenly handed the back-up envelope for Actress in a Leading Role instead of the envelope for Best Picture to presenters Warren Beatty and Faye Dunaway," the statement read. "Once the error occurred, protocols for correcting it were not followed through quickly enough by Mr. Cullinan or his partner."

See photos from the moment:

15 PHOTOS
Best Picture error at the 2017 Oscars
See Gallery
Best Picture error at the 2017 Oscars

US actor Warren Beatty (C) shows the card reading Best Film 'Moonlight' after mistakingly reading 'La La Land' initially at the 89th Oscars on February 26, 2017 in Hollywood, California.

(MARK RALSTON/AFP/Getty Images)

Host Jimmy Kimmel reacts after the 89th Oscars on February 26, 2017 in Hollywood, California.

(MARK RALSTON/AFP/Getty Images)

The cast of 'Moonlight' and ''La La Land' appear on stage as presenter Warren Beatty (C) shows the winner's envelope for Best Movie 'Moonlight' on stage at the 89th Oscars on February 26, 2017 in Hollywood, California.

(MARK RALSTON/AFP/Getty Images)

89th Academy Awards - Oscars Awards Show - Hollywood, California, U.S. - 26/02/17 - Warren Beatty holds the card for the Best Picture Oscar awarded to "Moonlight," after announcing by mistake that "La La Land" was winner.

(REUTERS/Lucy Nicholson)

'La La Land' producer Jordan Horowitz holds up the winner card reading actual Best Picture winner 'Moonlight' with actor Warren Beatty onstage during the 89th Annual Academy Awards at Hollywood & Highland Center on February 26, 2017 in Hollywood, California.

(Photo by Kevin Winter/Getty Images)

Prior to learning of a presentation error, 'La La Land' producers Fred Berger, Jordan Horowitz and Marc Platt accept the Best Picture award for 'La La Land' (later awarded to actual Best Picture winner 'Moonlight') onstage during the 89th Annual Academy Awards at Hollywood & Highland Center on February 26, 2017 in Hollywood, California.

(Photo by Kevin Winter/Getty Images)

Prior to learning of a presentation error, 'La La Land' producers Fred Berger, Jordan Horowitz and Marc Platt accept the Best Picture award for 'La La Land' (later awarded to actual Best Picture winner 'Moonlight') onstage during the 89th Annual Academy Awards at Hollywood & Highland Center on February 26, 2017 in Hollywood, California.

(Photo by Kevin Winter/Getty Images)

Cast and crew of 'Moonlight' accept the Best Picture award onstage during the 89th Annual Academy Awards at Hollywood & Highland Center on February 26, 2017 in Hollywood, California.

(Photo by Kevin Winter/Getty Images)

Director Barry Jenkins and the cast and crew of 'Moonlight' accept the Best Picture award onstage during the 89th Annual Academy Awards at Hollywood & Highland Center on February 26, 2017 in Hollywood, California.

(Photo by Kevin Winter/Getty Images)

'La La Land' producer Jordan Horowitz (L) holds up the winner card reading actual Best Picture winner 'Moonlight' with actor Warren Beatty onstage during the 89th Annual Academy Awards at Hollywood & Highland Center on February 26, 2017 in Hollywood, California.

(Photo by Kevin Winter/Getty Images)

'La La Land' producer Jordan Horowitz (L) announces the actual Best Picture winner as 'Moonlight' after a presentation error with actor Warren Beatty (R) onstage during the 89th Annual Academy Awards at Hollywood & Highland Center on February 26, 2017 in Hollywood, California.

(Photo by Kevin Winter/Getty Images)

89th Academy Awards - Oscars Awards Show - Hollywood, California, U.S. - 26/02/17 - Warren Beatty holds the card for the Best Picture Oscar awarded to "Moonlight," after announcing by mistake that "La La Land" was winner.

(REUTERS/Lucy Nicholson)

89th Academy Awards - Oscars Awards Show - Producer Jordon Horowitz holds up the card for the Best Picture winner Moonlight. At left is Ryan Gosling and right is presenter Warren Beatty who mistakenly announced La La Land as the best picture winner.

(REUTERS/Lucy Nicholson)

89th Academy Awards - Oscars Awards Show - Hollywood, California, U.S. - 26/02/17 - Jordon Horowitz and Jimmy Kimmel react as Warren Beatty holds the card for the Best Picture Oscar awarded to "Moonlight," after announcing by mistake that "La La Land" was winner.

(REUTERS/Lucy Nicholson)

HIDE CAPTION
SHOW CAPTION
of
SEE ALL
BACK TO SLIDE

One thing the firm's statement didn't address? The fact that Cullinan tweeted a since-deleted photo of Best Actress winner Emma Stone moments before the incident occurred. Not only that, but it also came to light that Cullinan was specifically asked not to post to social media during the ceremony.

"Brian was asked not to tweet or use social media during the show," a source told People. "He was fine to tweet before he arrived at the red carpet, but once he was under the auspices of the Oscar night job, that was to be his only focus. Tweeting right before the Best Picture category was announced was not something that should have happened."

Cullinan was one of two PwC employees in charge of bringing the result envelopes to the ceremony and then handing them to the presenters before they took the stage. Cullinan had walked the red carpet with his colleague Martha Ruiz carrying identical briefcases full of the results before they took their places at either end of the Oscars stage. Cullinan, though, was the one to give the wrong envelope to Warren Beatty and Faye Dunaway.

Cullinan has yet to speak on the incident.

See all of the red carpet arrivals at the 2017 Oscars:

89 PHOTOS
Oscars 2017: Red carpet arrivals
See Gallery
Oscars 2017: Red carpet arrivals
Jennifer Aniston put her best foot forward in an extremely sexy black dress that featured a thigh-high sliy an nd a plunging neckline. Lookin' good J! REUTERS/Danny Moloshok
Metallic maven! Red-carpet veteran Jessica Biel strikes gold in this unique number.

Nicole Kidman was the epitome of perfection in a sparkling nude Armani gown she paired with a dramatic red lip.

(Photo by Frazer Harrison/Getty Images)

'La La Land' star Emma Stone stunned, yet again, in a fringed gold Givenchy ensemble. She looked sophisticated with her dramatic red lip and Old Hollywood-inspired curls.

(Photo by Frazer Harrison/Getty Images)

Lady in red! Ginnifer Goodwin matched the red carpet in a long-sleeved, sheer ensemble that she matched with a clutch of the same color.

(Photo by Jeff Kravitz/FilmMagic)

'Fifty Shades Darker' star Dakota Johnson opted for a more conservative look in a yellow-hued gown that covered most of her body.  

(Photo by Steve Granitz/WireImage)

Ruth Negga, nominee for Best Actress, wears vibrant red Valentino.

Wow! Charlize Theron stunned in metallic black Dior ensemble with a plunging neckline.

(Photo by Frazer Harrison/Getty Images)

The queen is back! Halle Berry made her triumphant Oscars return in a one-shoulder black-and-gold gown.

(Photo by Steve Granitz/WireImage)

Michelle Williams dazzled in a two-toned halter gown with a plunging neckline.

(Photo by Jeff Kravitz/FilmMagic)

Matt Damon looked totally dapper in his sleek tux, but it was his wife Luciana Barroso who stole the show in a sophisticated grey ensemble with a plunging neckline.

(Photo credit should read VALERIE MACON/AFP/Getty Images)

Meryl Streep basically skipped the red carpet, but she made sure to show off her dress inside and was a stunner in a midnight blue off-the-shoulder dress. 

(REUTERS/Lucy Nicholson)

Scarlett Johansson turned out to the Oscars in a totally different number, a pastel pink silky, flowy dress with a thick belt. (Photo by Jeff Kravitz/FilmMagic)
THE OSCARS(r) - The 89th Oscars(r) broadcasts live on Oscar(r) SUNDAY, FEBRUARY 26, 2017, on the ABC Television Network. (Tyler Golden/ABC via Getty Images) TRUDIE STYLER, STING
"Moana" star Dwayne Johnson and Lauren Hashian were quite the sexy pair. Johnson took a colorful approach in a midnight blue, velvet dress. (Photo by Kevin Mazur/Getty Images)

Brie Larson sported a sophisticated twist to the typical black gown with a dramatic neckline and a ruffled train.

(Photo by Frazer Harrison/Getty Images)

Busy Philipps, who hit the red carpet with BFF and date Michelle Williams, turned heads in a strapless velvet green gown with sheer accents.

(Photo by Kevin Mazur/Getty Images)

Viola Davis was a vision in bright red, wearing an off-the-shoulder look with a classy train.

(Photo by Steve Granitz/WireImage)

Hailee Steinfeld's sheer gown features floral embellishments in pastel shades. 

Chrissy Teigen hits the red carpet in a leggy style that has never failed her. She looks stunning!

(Photo by Frazer Harrison/Getty Images)

Ryan Gosling went the vintage route in a Gucci DIY Made to Order black velvet tuxedo and a black velvet bow tie. The look was both fun and unique. 

(Photo by Jeff Kravitz/FilmMagic)

Salma Hayek's spaghetti-strap bodice plays up her age-defying body -- are we really supposed to believe she's 50?!
Knockouts! Jamie Dornan and Amelia Warner made quite the couple. Amelia looked incredible in a polka dot dress with a cape in a blush color. (Photo by Jeff Kravitz/FilmMagic)

Beautiful! Emma Roberts showed up to the red carpet with fiery new locks. But can we talk about that gown? Absolutely stunning!

(Photo by Kevin Mazur/Getty Images)

Stunning! Alicia Vikander's high-low dark lace gown stole the show. She paired the look with strappy heels and a gorgeous diamond choker. 

(Photo by Kevin Mazur/Getty Images)

OMG! Blanca Blanco's ultra-revealing slit is so front-and-center, we barely even notice the statement shoulders.

Leslie Mann is giving us serious Disney princess vibes (Belle anyone?!) in this bright yellow ball gown.

(Photo by Jeff Kravitz/FilmMagic)

She never disappoints! Olivia Culpo wears a one-of-a-kind Marchesa for Stella Artois gown.
Va-va-voom! Taraji P. Henson is a modern-day Jessica Rabbit in this figure-hugging blue velvet look by Alberto Ferretti.

John Legend's oversized bowtie he matched with his Gucci tux is just quirky enough to stand out.

(Getty)

Scarlett O'Hara, is that you? Nancy O'Dell goes for old-school glamour in this full red ballgown.
Where do we even start?! E! News host Zuri Hall's multi-textured lavender gown is a true work of art.
The definition of "blonde bombshell," Karlie Kloss' streamlined white Stella McCartney look stole the show.

Gorgeous! Octavia Spencer wowed in an off-the-shoulder Marchesa dress with a feathery bottom.

(Photo by Steve Granitz/WireImage)

Aloha! Auli'i Cravalho, voice of Disney's Moana, embraces her Hawaiian roots in a shell-inspired white gown with gold detailing.
Crisp & clean: Lucas Hedges is tailored to perfection in a classic tux.
Hollywood hunk! Luke Bracey ups the game in a black velvet coat.
Fashion Police host Brad Goreski is smart and stylish in a blue velvet smoking jacket.
Glen Powell looks casual on the carpet, but he still cleans up nice in a black tux.
Jason Bateman let Amanda Anka steal the show in her sheer dove gray lace number. Gotta love a sexy halter top!
It's all in the details: TV personality Debbie Matenopoulos' asymmetrical nude gown features a stunning waterfall sleeve.
Sofia Carson is Oscars royalty in a white tulle ballgown with metallic detailing.
Aldis Hodge accents his tux with statement jewelry.
Look at that figure! 'Good Morning America' anchor Robin Roberts glows in gold.
John Savage ditches the black suit/black shoes rule with brown kicks.
A far cry from her 'Star Wars' wardrobe: Felicity Jones' delicate ballerina-inspired tulle dress is understated but stunning.
Isabelle Huppert vamps up an angelic white dress with a bold scarlet lip.
Michael Strahan goes for luxury in a black velvet suit.
Can you believe she's only 14?! Brianna Perez accents her ivory gown with a shimmering silver choker.
Jackie Chan appeared on the carpet with two adorable friends! The star has two real pandas of his own and is an advocate for panda protection.
Jerry O'Connell mixes things up in a silky maroon blazer with dark brown lapels.
'Moonlight' director Barry Jenkins smiles big in a crisp black tux with silk lapels.

Sofia Boutella took a fashion risk with an unexpected feathery twist.

"Hacksaw Ridge" star Teresa Palmer looked gorgeous in a silver number with tons of pleats. (Photo by Frazer Harrison/Getty Images)
Sunny Pawar's kicks -- and awesome attitude! -- are second to none on the red carpet.
Shohreh Aghdashloo is head-to-toe majestic in shimmering black.
Andrew Garfield, nominee for Best Actor, is in good spirits in a slim-fit tux.
Why play by the rules? Riz Ahmed's perfect-fitting blue suit is fun but event-appropriate.
David Oyelowo's clean white jacket is a red-carpet win.
Vince Vaughn was handsome as ever at the Oscars. He's wearing Johnston & Murphy X David Hart Lace Ups. (Photo by Frazer Harrison/Getty Images)
Director Ava DuVernay commands the carpet in a dramatic gray A-line gown.
Jharrel Jerome's black-and-white look is a fashion win for the star's first Oscars ceremony.
HOLLYWOOD, CA - FEBRUARY 26: Actor Jessica Oyelowo attends the 89th Annual Academy Awards at Hollywood & Highland Center on February 26, 2017 in Hollywood, California. (Photo by Frazer Harrison/Getty Images)
Screenwriter Tarell Alvin McCraney is full-on white on white, all the way down to his squeaky-clean loafers.
HOLLYWOOD, CA - FEBRUARY 26: Actor Tracy Pollan attends the 89th Annual Academy Awards at Hollywood & Highland Center on February 26, 2017 in Hollywood, California. (Photo by Kevin Mazur/Getty Images)
HOLLYWOOD, CA - FEBRUARY 26: Actor Michael J. Fox attends the 89th Annual Academy Awards at Hollywood & Highland Center on February 26, 2017 in Hollywood, California. (Photo by Frazer Harrison/Getty Images)
AMPAS CEO Dawn Hudson looked lovely in white. (Photo by Steve Granitz/WireImage)
Screenwriter Allison Schroeder rocks a gorgeous rose-toned chiffon V-neck gown.
SLAY! No one could rock this incredible multidimensional gown quite like Janelle Monae.
Dev Patel joins the white jacket trend -- and we're loving the scruffy 'do!
She never ages! Laura Dern rocks a sequinned navy gown.
Have mercy! Mahershala Ali is breaking hearts all over the world in this picture-perfect black-on-black ensemble.
HOLLYWOOD, CA - FEBRUARY 26: Actor Andrew Garfield attends the 89th Annual Academy Awards at Hollywood & Highland Center on February 26, 2017 in Hollywood, California. (Photo by Jeff Kravitz/FilmMagic)
Was math class always this hot? Priyanka Chopra is a geometric goddess in this innovative architectural look.
Lookin' good! Javier Bardem ditched the predictable bowtie for a thin black tie and smart suit from Gucci.
Samuel L. Jackson and LaTanya Richardson Jackson contrast yet complement each other: He wears a deep blue jacket and matching tie, while she opted for romantic peach ruffles.
Always an original! Faye Dunaway's buttoned-up look turned heads on the red carpet.
HOLLYWOOD, CA - FEBRUARY 26: Actor Kate McKinnon attends the 89th Annual Academy Awards at Hollywood & Highland Center on February 26, 2017 in Hollywood, California. (Photo by Kevin Mazur/Getty Images)
Sara Bareilles was absolutely stunning in a red dress with an angled neckline. (Photo by Kevin Mazur/Getty Images)
Jeremy Renner put his best foot forward in a classic tuxedo. (Photo by Kevin Mazur/Getty Images)
Seth Rogen and his wife Lauren Miller looked quite classy in a tux and a red dress. (Photo by Kevin Mazur/Getty Images)
Best Actor nominee Casey Affleck is all cleaned up for his big night -- but he kept his trademark scruffy beard and ponytail! (Did you really expect anything else?)
What can he say except "you're welcome"? 'Moana' star Dwayne Johnson is a real-life demigod in a fun blue velvet jacket and gray pants.
Putting everyone's husbands to shame: Chris Evans conquered the red carpet in this unexpected all-blue ensemble.
Sheldon's looking dapper! Jim Parsons is far from his nerdy "Big Bang Theory" persona on the red carpet. He rocked Johnston & Murphy shoes.
She's giving us butterflies! Kelly Ripa surprised onlookers with a a creature-adorned navy gown.
Go bold or go home! Cynthia Erivo proves she's not afraid of patterns in an A-line frock.

Terrence Howard and Mira Pak arrive at the Oscars. Howard is wearing a Piaget timepiece.

(Photo by George Pimentel/FilmMagic)

HIDE CAPTION
SHOW CAPTION
of
SEE ALL
BACK TO SLIDE

More from AOL.com:
Alec Baldwin to co-write political parody book mocking Trump
Susan Sarandon hangs with 24-year-old son -- and he's her spitting image
John Mellencamp claims he left Columbia Records over former exec's racist remark

Read Full Story

Sign up for Entertainment Insider by AOL and get the top celebrity, movies, music and TV news delivered to your inbox daily!

Subscribe to our other newsletters

Emails may offer personalized content or ads. Learn more. You may unsubscribe any time.

From Our Partners