A 911 call placed by Austin Harrouff's mother reveals that her son was wearing a 'Make America Great Again' hat moments before allegedly murdering a random couple and biting pieces of flesh off one of the victims.

Harrouff, 19, was arrested Monday night after he allegedly killed John Stevens II, 59, and his 53-year-old wife, Michelle Mischon, 53, outside their Jupiter, Florida home, in what has been described as an unprovoked attack.

According to a police report released Thursday afternoon, Austin's mother, Mina Harrouff, contacted the authorities on the night of the slayings saying that her son had been acting strangely for days and claiming superpowers.

The mother said her son abruptly left the Duffy's restaurant they were having dinner at on Monday after having an argument with his father.

During the call, Mina said her son, a Florida State student and fraternity member, was last seen wearing white shorts, a blue polo and a red 'Make America Great Again' hat.

The hat's statement has been popularized by Republican Presidential candidate Donald Trump, as he has used the slogan on merchandise for his campaign.

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Concerned mom: Mina Harrouff, Austin's mother (pictured together) called police before he allegedly killed a random Florida couple on Monday. She supplied cops with a description of what he was wearing

Mina said Austin (right) was sporting a red 'Make America Great Again' hat (file above left) when he left the restaurant they were having dinner at before he allegedly went on a random killing attack

The 19-year-old college student is accused of stabbing to death Michelle Mishcon, 53, and her husband, John Stevens III, 59 (pictured together) before reportedly biting pieces of flesh off of the man's face

About five days before Harrouff allegedly launched a deadly knife attack on the random couple, he posted a video online in which he mused about bodybuilding and steroids.

Daily Mail on Wednesday uncovered Harrouff's YouTube channel containing several videotaped fitness tutorials, as well as impromptu karaoke performances by Harrouff.

The rising sophomore studying exercise science is also accused of biting pieces of flesh off John Stevens' face and stabbing the couple's neighbor, 47-year-old Jeff Fisher, who tried to come to their rescue.

An autopsy showed that Mishcon was beaten to death, while her husband died of multiple knife wounds and was partially cannibalized. The wife had also been stabbed, but those injuries were not fatal.

Online tutorial: Harrouff had posted bodybuilding tutorials on YouTube in the days and weeks leading up to the attack. In his latest video, posted just five days before the attack, the teen talks about why he does not want to take steroids

Harrouff walked four miles north towards his father's house, but inexplicably turned onto the 19000 block of Southeast Kokomo Lane where the Stevenses were sitting in their garage

On August 11, Harrouff uploaded online a 2-minute video in which he appears shirtless and explains his approach to bodybuilding, and why he has decided to reject steroids.

‘I came to the realization of something,’ Harrouff says into the camera. ‘I no longer want to follow Arnold or any other bodybuilder. I want to follow myself, you know. I want to actually believe in myself.

'I don’t need drugs. I know that they can change me, but the thing is, that is not being healthy. Being healthy is what's natural, you know, what comes natural to you. You think steroids are natural?’ he asks rhetorically.

Harrouff then continues: ‘I think steroids really aren't for me. I used to think I needed steroids to be, to be a bodybuilder, to be this thing, to be this symbol.'

He concludes his monologue with the words: ‘we're all the same though, peace out.’

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'Vacuum pose': The aspiring bodybuilder recorded a tutorial showing how to perform the vacuum pose

Harrouff had raised the subject of steroids in another video posted a couple of days earlier, in which he is seen driving and talking with a fake Southern accent.

'I don't feel like it'd be beneficial for me to do steroids,' he says. 'It damages my health, I feel like I have to depend on it every day. That's a life not worth living for me.'

In another minute-long clip recorded in his car, the 19-year-old, speaking in a bizarre voice reminiscent of the Muppets character Kermit the Frog, Harrouff argues that the best chest exercise is the bench press.

The video ends with an unhinged Harrouff cursing and screaming hysterically into the camera.

Harrouff raised the subject of steroids in another video, in which he is seen driving and talking with a fake Southern accent

HISTORY OF DUI'S AND SUBSTANCE ABUSE OF AUSTIN HARROUFF'S DENTIST DAD REVEALED Austin Harrouff is pictured with his father, Dr Wade Harrouff, a Florida dentist The South Florida home where alleged cannibal Austin Harrouff spent his youth may have been plagued by substance abuse. According to criminal records obtained by the Daily Mail, Harrouff’s dad was arrested twice for Driving Under The Influence of drugs or booze. Wade Harrouff, the suspect’s 61-year-old dad, was pulled over by Juno Beach Police in July 26, 2011 after cops observed him driving erratically about 11.30pm in the tiny beach town. The car was accelerating and braking while driving through empty parking lots and a park that was closed for the night. When the officer came to Harrouff’s window, Harrouff appeared confused and agitated. He readily admitted to having four vodka cocktails at a strip club. To make matters worse, Harrouff admitted to being on ‘numerous medications’ for muscle relaxations and back pains. The officer smelled the odor of alcohol on Harrouff’s breath after he refused to take a Breathalyzer test. He was booked in the local and charged with DUI and two counts of reckless driving. Court records show the state authorities didn’t prosecute the DUI but a judge found him guilty of two counts of reckless driving. He was sentenced to six months’ probation and 50 hours of community service. In April 2012, however, Wade was not off probation yet when he was picked up for DUI again, this time by a Florida State Trooper who found him sleeping at the wheel of his car on the side of a road near West Palm Beach, with the engine on. Harrouff told the trooper he was on his way home from a girlfriend’s house in Delray Beach when he felt tired and stopped. The trooper, however, said Harrouff’s Jeep Cherokee matched the description of a vehicle driving erratically moments earlier. Again, Harrouff seemed confused and almost fell when he exited his car. He refused to take a breathalyzer test and was booked into the Palm Beach County jail on suspicion of DUI. In time, Harrouff pleaded guilty to the charge and, because he was still on probation for the first incident, received a stiff sentence. He was placed on 1-year probation. His driver’s license was suspended for six months. He has to subject himself to random drug testing and served another 50 hours of community service. Advertisement

Other recordings shared on Harrouff’s channel over the past two weeks include the buff teenager showing how to do the bodybuilder's 'vacuum' pose, in which he sucks in his stomach, and discussing the importance of having persistence with a fake Russian accent.

When he was not busy expounding on the subject of steroids and healthy living, the FSU student recorded himself singing karaoke, including such classics as Live Like Your Dying by Tim McGraw, Hound Dog by Elvis Presley and The Beatles' Let It Be.

Following his arrest Monday night, Martin County Sheriff William Snyder described Harrouff as 'abnormally strong' and said that it took four officers and a K9 dog to tear him away from John Stevens' lifeless body.

One of the officers used a stun gun on him multiple times, but Harrouff remained unfazed.

He spent the night sedated and on a ventilator with guards stationed in the intensive care unit at St Mary's Medical Center in West Palm Beach.

Thursday morning, Harrouff's condition was upgraded from critical to stable but he has been unable to speak because of a breathing tube. He was scheduled to undergo hand surgery.

While initial drug tests came up negative for cocaine, methamphetamines, marijuana and opiates, investigators will also be testing Harrouff for flakka and bath salts.

Daily Mail on Wednesday spoke to an acquaintance of Harrouff's from FSU, who speculated that steroids may have played a role in Monday's vicious attack.

'I don't think it was flakka or any sort of hallucinogen,' said the FSU student, who asked not to be named. 'I just think that this kid had a steroids dependency and had a bad, bad roid rage that night.

'I can anonymously attest that this guy had gotten bigger and bigger at alarming rates throughout our first year of college.'

Fitness fanatic: The 19-year-old (pictured far right) is a rising sophomore at FSU studying exercise science

The teen's mother also told police that he claimed to have superpowers and that he was 'here to protect people,' according to the police report.

Mina, who was dining with her son and ex-husband Dr Wade Harrouff before the attacks, told Officer Luis Rocha her son had no history of mental illness nor heavy drug use.

‘Mina told me that she does not believe him to be a danger to anyone or to himself,’ Rocha wrote in the police report.

Harrouff lives a few miles away with his mother and was in town with some of his fraternity brothers, members of Alpha Delta Phi.

Harrouff was out to dinner with his parents at the sports bar Duffy's West (pictured) when he became agitated and left during the meal, prompting his parents to call the police over his bizarre behavior

Grisly scene: Deputies were summoned to the Stevenses' home on Kokomo Lane to discover Harrouff on top of John Stevens III, biting him and growling, according to police

Sheriff William Snyder said at 8.30pm, Harrouff was out to dinner with his parents at the sports bar Duffy's West.

According to his parents, Harrouff became agitated - possibly over slow service - and left during the meal.

Harrouff appeared to walk towards his father Wade's (pictured) home, before he turned onto Kokomo Lane

They were so concerned they called the police, while his frat brothers went looking for him.

One Duffy's employee said the surveillance video had been handed over to authorities.

Harrouff is believed to have walked four miles away towards his father's house, but inexplicably turned left onto Southeast Kokomo Lane.

The Steveneses were sitting in the garage of their stucco home on Kokomo Lane with the door open, when the attack occurred at around 9.15pm.

Snyder, who said there was no link between Harrouff and the married couple, described the attack as 'random as random can be'.

Harrouff allegedly stabbed the couple with a switchblade knife he was known to carry around.

Multiple ‘weapons of opportunity,’ were also used to inflict massive trauma to the victims' bodies.

Snyder said it was clear that John had fought back.

Star athlete: Harrouff wrestled and played football at Suncoast Community High School in Riviera Beach, Florida

Investigators say Mr Stevens, pictured above with his wife on a fishing trip, fought back and suffered lacerations and blunt force trauma

Star athlete: Harrouff wrestled and played football at Suncoast Community High School in Riviera Beach, Florida

‘There was an enormous amount of violence inside that garage,’ Snyder said.

In a 911 call released by the Martin County Sheriff’s Office, Jeff Fisher, who rushed over to help his neighbors, can be heard gasping for air before asking for police and medical help.

He said: 'I think he had a knife but I'm not positive.

'There's a girl laying on the ground, he beat her up.

'I ran over there, I'm bleeding profusely here at the moment, I don't know what happened. I've been stabbed in the back,' he told the dispatcher.