Bristol, CT – The brother of late NFL player and convicted killer Aaron Hernandez was arrested last week for the fourth time this year after multiple sources warned police he was plotting to carry out a mass shooting at a school.

According to court documents, the Bristol Police Department (BPD) obtained evidence indicating Dennis “DJ” Hernandez has become “gravely disabled and [is] a danger to society,” TMZ reported.

Police said DJ Hernandez’s ex-girlfriend told them he had used her car on July 7 and was supposed to go to a court hearing, but that he instead drove himself over to the University of Connecticut and Brown University.

He then proceeded to go into “a number of classrooms and buildings,” police said.

Another source allegedly told investigators they believed DJ Hernandez went to the schools to help fine-tune his plot to carry out a mass shooting, TMZ reported.

“Will I kill? Absolutely, I’ve warned my enemies so pay up front,” he threatened in a social media post on July 19.

According to court documents, multiple people spoke with police about their concerns regarding DJ Hernandez throughout the past month, WFSB reported.

“Dennis is extremely sick and… his mental health is continuing to deteriorate,” one source said, according to investigators. “Dennis said that ‘he has a bullet for everyone.’”

He also made threats against the University of Connecticut in a series of text messages, WFSB reported.

“UConn program is going to pay unless I have a package deal and I get my estate and every single thing I have worked for,” he allegedly wrote. “The coaches and university officials want to be selfish and selective about [expletive], well I am too. Very. They are going to get surprised.”

“Love you, I would recommend remaining away from there because when I go I’m taking down everything and I don’t give a [expletive] who gets caught in the crossfire,” he added. “I’ve died for [years] now and now its others peoples turn. I’m prepared to give my life so if I don’t get to see you on the outside know I love you always. Not all shootings are bad I’m realizing. Some are necessary for change to happen.”

DJ Hernandez also allegedly sent another text saying he would be “taking lives if s–t isn’t paid up,” TND reported.

“It’s been years in planning just taking notes, names and locations. They talked their way into this and it’s almost point game,” he allegedly wrote.

The BPD said they tracked DJ Hernandez down at a residence on July 19, but that he refused to cooperate with them, TMZ reported.

A standoff ensued.

The suspect allegedly told police that he was “on foot, armed and that if we approached him, he would kill us all,” according to court documents.

DJ Hernandez ultimately exited the home with his arms stretched out to his sides while “advancing towards the police” and “yelling ‘shoot me,’” TMZ reported.

He ignored the officers’ commands and was ultimately Tasered and taken into custody.

DJ Hernandez was transported to the hospital, where he allegedly vowed to kill “anyone who profited off of his brother Aaron,” according to police.

He was later released from the hospital and booked into jail on charges of breach of peace and threatening, TMZ reported.

His bond was set at $250,000.

It was just the latest of a slew of recent arrests for DJ Hernandez, TMZ reported.

He allegedly led police on a wild vehicle pursuit back in March.

Days after that incident, he was arrested yet again after police said he threw a brick and a note at the ESPN campus, TMZ reported.

“To all media outlets, It’s about time you all realeyes the affect media has on all family members,” the message read, according to TND. “Since you’re a world wide leader maybe you could lead how media and messages are delivered brick by brick. Clean it up! Yours truly, Dennis J. Hernandez.”

He was back behind bars for a third time earlier in July after he skipped out on a court date.

DJ Hernandez is the younger brother of former NFL tight end Aaron Hernandez, who played for the Patriots, TND reported.

Aaron Hernandez committed suicide in his prison cell in 2017 while serving time for a homicide conviction.