Gunman accused of killing four people in random Florida attacks viewed porn after three of the slayings

A gunman accused of killing four people in random attacks late last year viewed porn after three of the slayings, according to records.

Howell Donaldson's iPhone data showed a "significant amount of Internet activity" close to the shooting deaths, according to the Tampa Bay Times.

More than 1,500 pages of investigative reports and audio recordings were released by prosecutors in response to the paper's public records request.

Prosecutors intend to seek the death penalty for the 25-year-old Donaldson, accused in the fatal shootings of four people between Oct. 9 and Nov. 14 in a Tampa neighborhood.

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Series of fatal shootings in Tampa -- Howell Donaldson III
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Series of fatal shootings in Tampa -- Howell Donaldson III

Three people were found murdered in less than two weeks in the Seminole Heights neighborhood of Tampa, Florida.

(Photo via Bureau of Alcohol, Tobacco, Firearms and Explosives)

Howell Emanuel Donaldson III, facing murder charges for a string of deadly shootings in Tampa, is seen in this handout photo received November 29, 2017. Tampa Police Department/Handout via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY.
Ryan Reynolds, 37, and a resident of the Tampa neighborhood of South Seminole Heights, talks on November 15, 2017 about the recent killings of four people in his neighborhood by gunshot over the last month. Police believe the four killings, none of which involved robbery or another obvious motive, may be related. With the reward for information leading to an arrest at $91,000, police urged the community to help. / AFP PHOTO / Les Neuhaus (Photo credit should read LES NEUHAUS/AFP/Getty Images)
A sign warning burglars to beware (L) is seen beside a church notice late November 15, 2017 in Tampa, Florida, with fears mounting over a possible serial killer after four unsolved murders, with police upping a reward for any clues. Before dawn on November 14, 2017, Ronald Felton, 60, became the fourth murder victim by gunshot while on his way to feed homeless people at the church within a months time. Tampa Police believe the killings are connected. / AFP PHOTO / Les Neuhaus (Photo credit should read LES NEUHAUS/AFP/Getty Images)
A memorial wreath rests late November 15, 2017 along the Tampa street where Ronald Felton, 60, was gunned down just a few feet away in the early morning hours the previous day, making him the fourth murder victim within a seven-block area in a months time. Police believe the four killings, none of which involved robbery or another obvious motive, may be related. With the reward for information leading to an arrest at $91,000, police urged the community to help. / AFP PHOTO / Les Neuhaus (Photo credit should read LES NEUHAUS/AFP/Getty Images)

Benjamin Edward Mitchell

(Photo via Bureau of Alcohol, Tobacco, Firearms and Explosives)

Monica Caridad Hoffa

(Photo via Bureau of Alcohol, Tobacco, Firearms and Explosives)

Anthony Naiboa

(Photo via Bureau of Alcohol, Tobacco, Firearms and Explosives)

Howell Emanuel Donaldson III, facing murder charges for a string of deadly shootings in Tampa, is seen in this handout photo received November 29, 2017.

(Tampa Police Department/Handout via REUTERS)

WATCH VID: https://t.co/XwauE5YCHG We believe this person may have ties to the Seminole Heights area. Contact… https://t.co/NjPn3wXu8b
WHO IS THIS? @TampaPD wants to find out if this person has anything to do with 3 murders in Seminole Heights:… https://t.co/pkDI63N8SF
DEVELOPING - 3 bodies found in #SeminoleHeights within 1 mile of each other in 10 days time - are the cases linked?… https://t.co/K3DAwLiXBw
#BREAKING Just a couple blocks from the memorial of a man shot in #SeminoleHeights, another person found randomly s… https://t.co/t4rVqTYAhF
Seminole Heights neighbors chanting "our streets" after three murders that appear to be random. https://t.co/HeDDe1bbiP
Another suspicious death in Tampa's Seminole Heights https://t.co/0K9uxM5wA9
Tampa Police Dept. releases new video of person of interest in the killings of three people. https://t.co/qENafTaNOg https://t.co/fqXUDmHIUp
We have added over 1000 streetlights in Seminole Heights. You've seen our men out there. We're not stopping until we catch this guy.
.@CityofTampa crews are working around the clock in Southeast Seminole Heights to clear vacant lots/alleys to reduc… https://t.co/LF6ZysiLdn
Amid hunt for possible serial killer, Tampa Police release more video of person of interest. @KerryNBC reports now… https://t.co/Mjp9ltr1Gs
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Cops noted 269 "Internet activities" between Oct. 5 and Nov. 4. The accused killer's lawyers had objected to publicly releasing some investigative materials, including the website name, which is redacted.

"In summary, Howell Donaldson showed a pattern of visiting this adult-themed website after committing three homicides," the warrant said, according to the Tampa Bay Times.

Investigators had previously said they used Donaldson's cellphone to establish his location at the time of the killings.

The records documented behavioral changes, which had begun to trouble his sometime girlfriend, according to the Tampa Bay Times. Nicole Minnis was in a relationship with Donaldson that ended in 2013.

Donaldson talked freely with detectives, the documents reveal, but he did not say much when they showed him photos of the victims.

"The people I showed you," a detective said. "Decent people. OK? That's a 60-year-old man that was out feeding the homeless. That's an autistic kid, okay, that missed his bus. This young woman, 30 years old, was merely walking from her aunt's place. All right? Just down the road, in her neighborhood. And this young man right here was waiting at a bus. To go pick up his girlfriend and make sure she got home safely. Decent people. People like you."

Donaldson spent five years at St. John's University in New York. He was a walk-on member of the basketball team during the 2011-12 season but never appeared in a game.

When he was arrested, he told cops he was trying to leave town.

"I'm just trying to get out of here so I can go back to school," he said, according to the Tampa Bay Times.

He suggested that he be taken to the airport.

"I'm just trying to get my education and further my career," he told cops. "I just want to do good in the world."

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