THE man arrested for allegedly gunning down rapper XXXTentacion reportedly wrote a threatening post on Facebook two days after the shooting — warning people not to make him angry.

“Don’t piss me off u will never know wats next,” wrote Dedrick Devonshay Williams on his apparent Facebook page, under the name Chucky Williams.

The message, posted on Wednesday, was accompanied by a picture of the 22-year-old posing in front of a white car and showing off a hefty gold bracelet.

Based on his social media, Williams appeared to be a dad of two and worked as a tattoo artist under the name “Tattooman Chucky.” He has a picture of the doll Chucky on his right arm.

In multiple photos, Williams can be seen showing off his gold “grillz,” tattoo skills or flashing fans of $20 notes.

Williams has a long rap sheet, with his first arrest dating back to 2014, when he admitted paying $80 for a car he knew was stolen, according to a probable cause affidavit. Between 2014 and 2017, he was arrested on a slew of charges including domestic violence, possessing a firearm as a convicted felon and probation violation, according to public records.

Earlier, the Broward County Sheriff’s Department announced on Thursday that Williams was arrested for allegedly fatally shooting XXXTentacion — whose real name was Jahseh Dwayne Onfroy — in a botched armed robbery.

Police said two men accosted Onfroy on Monday as he sat in the driver’s seat of his BMW outside a motorcycle dealership in Florida — and made off with the rapper’s Louis Vuitton bag.

Williams is charged with first-degree murder without premeditation. He’s being held without bond in the Broward County Jail.

A lawyer reportedly wasn’t listed on jail records.

Hours after the arrest, fans of the slain 20-year-old musician swarmed the suspected shooter’s social media pages, calling him “heartless” and writing “f**k you.”

After the shooting, XXXTentacion was transported to a nearby hospital, where he was later pronounced dead.

The rapper had a short but controversial career. Emerging from the burgeoning SoundCloud scene, three of his songs made the US top 40 in the first six months of 2018.

But though he was considered an emerging star, with the likes of Kanye West and Diplo publicly praising his music, he was dogged by troubling charges for violent offences, including armed robbery and beating a pregnant ex-girlfriend to the point where her vision was impaired.

In December, he was charged in connection to that 2016 domestic abuse case, and was placed on house arrest until March; a date for his trial had not yet been set when he was shot.

Stars mourned the rapper’s loss on Twitter. Kanye West, Diplo, J. Cole and Blink-182 drummer Travis Barker were among those who paid tribute to the late 20-year-old on social media.

The Broward County sheriff’s office offered a $US3000 ($4000) reward for any information that would help them arrest a suspect in the rapper’s murder.