A woman told police Mark Cuban sexually assaulted her in 2011

Mavericks owner Mark Cuban was reportedly investigated by Portland, Ore., police in 2011 after a woman claimed the billionaire sexually assaulted her at a bar.

According to a police report obtained by the Willamette Week, the woman said Cuban stuck his hand down the back of her jeans and digitally penetrated her while the two posed for a photo.

Cuban was never charged with a crime after the Multnomah County District Attorney’s Office determined there was insufficient evidence to press charges.

Cuban denied the accusations as news of the alleged assault surfaced Tuesday night.

“It didn’t happen,” Cuban wrote in an email to The Associated Press.

The alleged assault occurred in April 2011, two months before the Mavericks would defeat the Heat to win their first NBA title.

The woman told the Portland alternative weekly she never sought publicity or attempted to seek compensation from Cuban. She is, however, adamant that Cuban assaulted her.

"I filed the report because what he did was wrong," she told the paper. "I stand behind that report 1,000%."

The incident reportedly unfolded at the Barrel Room bar.

The woman said she arrived with her boyfriend and friend at around 11:30 p.m. They left at around 2 a.m., shortly after her boyfriend suggested she try to take a picture with Cuban, who was standing by himself. The woman's friend later told police Cuban appeared "very drunk."

Cuban agreed to pose for a photo, initially placing his right hand on her lower back.

"He then moved his hand down until it was on her buttocks," according to a detective's summary of the alleged victim's statement, per the Willamette Week. "Cuban then pushed his hand down the back of her jeans and inside her underwear where he cupped his hand over her groin area and inserted the tip of his finger into her vagina."

The woman was conflicted on whether to file a complaint, but eventually contacted police two weeks later.

The woman submitted seven photos taken with Cuban, two of which police deemed "significant." Both images show Cuban's right shoulder lowered, "and he appears to be stretching to reach his arm down."

In one of the two photos, police noted the woman's facial expression.

"Her teeth are clenched, eyes wider than the other pictures and brow raised showing a look of surprise and strain," the police report reads, according to the Willamette Week.

When contacted by police, Cuban was adamant no sexual assault occurred. Cuban gave the names of two people who had been with him at the bar as witnesses: All-Star forward Kevin Love and reporter Lindsay McCormick.

Cuban then hired Stephen Houze, a local criminal defense lawyer who paved the way for Cuban to be cleared. Houze ordered a polygraph test, which supported Cuban's denial. Polygraph results, however, are generally inadmissible in Oregon courts.

Houze also contacted two urologists from George Washington University Medical School who provided a written opinion claiming Cuban could not have physically committed the sexual assault he was accused of.

"(Cuban) is a large male with large hands, making penetration without lubrication of the woman in the standing position (is) virtually impossible," the doctors wrote.

News of Cuban's alleged sexual assault comes two weeks after Sports Illustrated's bombshell report detailing a culture "rife with misogyny and predatory sexual behavior" within the Mavericks organization. According to SI, former Mavericks president and CEO Terdema Ussery allegedly made countless inappropriate remarks, numerous sexual advances and groped multiple women throughout his 19-year tenure with the team.

Cuban told SI he only became aware of the allegations when reached for comment. Two former team employees, however, told SI it's highly unlikely Cuban had no knowledge of sexual harassment taking place within the organization.