The Broward Sheriff's Office did not respond to Newsweek's request for comment.
In this Tuesday, June 19, 2018 photo, fans and community members light candles as they gather at a vigil for rap singer XXXTentacion in Deerfield Beach, Fla., near the site where the troubled rapper-singer was killed the day before.
A judge reportedly ordered Williams - who is also facing a probation violation charge related to his involvement in a 2014 grand theft auto case - to be held without bond.
Police in Miami originally arrested a suspect, Dedrick Williams, but have now confirmed that they are searching for a second man in connection with the murder, which they think was a failed robbery.
Williams has been charged with one count of first-degree murder.
"Detectives from BSO's Strategic Investigations Division assisted homicide detectives by taking Dedrick Williams into custody Wednesday night following a traffic stop", the Broward County Sheriff's Office also tweeted.
According to the arrest warrant, obtained by The Blast, officials say the murder of 20-year-old X was "premeditated" by Dedrick Williams, and that a struggle took place before he was shot and left to die.
Nobody responded at Williams' home, a rental bungalow in a modest neighborhood of Pompano Beach.
XXXTentacion, who sported dreadlocks and facial tattoos, was a rising star.
"In March, XXXTentacion's sophomore album, "?", debuted at No. 1 on the Billboard 200 album chart.
"They came to me and asked me if they could put him in my room".
"She is stunned, devastated, somewhat rudderless at this point, she's a very young mother, 36 or 37, and one of the nicest ladies you'd ever meet", Bogenschutz said.
According to local media reports, he had spent time in jail and was awaiting trial on allegations of domestic violence against his pregnant girlfriend. He later faced more charges including witness tampering.