JACKSONVILLE, Fla. – A Jacksonville rapper charged in the 2020 shooting death of 23-year-old Charles “Lil Buck” McCormick Jr . and the 2019 shooting death of 16-year-old- Adrian “Lil Bibby” Gainer Jr . will be back in court Thursday.

Hakeem Robinson is scheduled for a pretrial hearing Thursday on the murder charges.

Late last year, a post on Robinson’s Instagram account made serious claims about his treatment at the Duval County jail. Those claims were brought up in front of Judge Tatiana Salvador in December.

Robinson’s attorney said his client had been moved to a psych ward, despite having no mental health history and no issues while in custody. He told the judge the new conditions were keeping him from communicating with Robinson.

“To whom this may concern, I Hakeem Robinson is being housed in PDF which is Duval pretrial detention facility. I am being mentally abused by staff officials in this facility,” the post reads. “My 14th Amendment which is my constitutional rights has been violated. I’ve been placed in isolation with other detainees who are mentally ill, have serious health issues, and have been diagnosed with different illnesses and disabilities. I’ve not violated any rules in this facility nor received any disciplinary orders.”

The post went on to say that Robinson has had mental breakdowns where he hasn’t eaten or slept in days.

“I fully understand this is jail and I can’t have things my way. But I am a human being and I deserve to be treated accordingly,” the post reads.

The post also said Robinson has not been able to talk to family members or other detainees, but the Jacksonville Sheriff’s Office disputed that claim.

Judge Salvador said that Robinson was being housed on the 6e level of the jail. She said 6e houses not only mental illness inmates but also juveniles and serves as discipline confinement for inmates who break the rules.

Robinson is currently under investigation. He is currently in ‘isolation,’ however, he’s not housed in any area as he described. As it pertains to the access to Instagram, no, inmates do not have access to such platforms.

Robinson can also speak to family for an hour a day.

Outside of this, we do not have any further information available.

Investigators said Robinson is a documented gang member, linked to the violent gang “ATK.” Members of ATK are also accused in the murder of Charles Jones , a Jacksonville rapper known as “Julio Foolio,” last July.

Back in February of 2019, 16-year-old Gainer, also known as “Lil Bibby,” was shot and killed at the Hilltop Apartments, and prosecutors believe Robinson was the gunman.

Fast forward to Jan. 15, 2020, McCormick Jr. was gunned down in a parking lot at the Dames Pointe Plaza.

Dominique Barner, also known as “Butta,” was another one of the men who were arrested in connection to the killing.

Barner was arrested on Aug. 13 on another charge of second-degree murder in the February 2019 shooting death of a bicyclist on Emerson Street.

Barner was offered a plea deal after court documents said he talked about his involvement in the murder with a jail informant who was wearing a wire.

According to court documents, Barner said that the group found McCormick’s address on public records, went to his home, and followed him to the shopping center. Barner also said he was the driver that day, according to court records.

He told investigators Robinson wanted to kill McCormick Jr. for making a rap song about Willie Addison, Robinson’s half-brother who was killed in a drive-by shooting .

JSO arrested Barner, Robinson, Leroy Whitaker, and Abdul Robinson Jr. in connection with McCormick’s death.

Hakeem Robinson’s attorney has said that he doesn’t fit the description of the shooter seen in a video of the shooting.