Tay-K 47 received an additional felony charge last week, after he was allegedly caught with a banned substance while in jail.

According to the Fort Worth Star-Telegram, the 18-year-old rapper was busted for possession of a cellphone on July 25. David McClelland, Chief of Staff for the Tarrant County Sheriff’s Office, told the newspaper that Tay-K attempted to hide the device inside his underwear and attempted to throw it down a toilet once it was discovered by a deputy.

“They asked him to remove it. That’s when he attempted to throw it in to the toilet to destroy the phone,” McClelland said. “When they tried to take the phone away from him, he got a little angry and got into an altercation with one of our jailers.”

Tay-K—real name Taymor McIntyre—was subsequently charged with possessing a prohibited item inside a correctional facility—a third-degree felony.

According to the Star-Telegram, Tay-K will be transferred to Tarrant County’s maximum-security jail, due to a previous altercation with his fellow inmate. The rapper will be held in solitary confinement for 23 hours day at the new facility, where he will also receive one hour of gym time.

Tay-K is facing capital murder and aggravated robbery charges for his alleged role in the 2016 shooting of 21-year-old Ethan Walker. He is also accused of fatally shooting 23-year-old Mark Saldivar in 2017. Though the rapper was 16 at the time of his alleged crimes, he will stand trial as an adult. Tay-K is reportedly not facing the death penalty; however, he could receive a life sentence if convicted on the charges.