XXXTentacion Murder Suspect First Court Hearing ... Held Without Bond

6/21/2018 10:05 AM PDT

XXXTentacion Murder Suspect Dedrick D. Williams Appears in Court

XXXTentacion's alleged murderer, Dedrick D. Williams, appeared in court Thursday to hear the charges he's facing in the shooting death of the 20-year-old rapper.

Williams just went before the judge at the Broward County Courthouse -- he's being charged with 1 count of first-degree murder and held without bond due to probable cause. He's also been hit with a probation violation stemming from a 2014 case, and will appear in court Monday for that.

As we reported ... Williams was arrested Wednesday night in South Florida and booked for first-degree murder by the Sheriff's Dept. He has previous arrests for cocaine possession, weapons possession, domestic violence, aggravated assault with a firearm and grand theft auto.

As we first reported, cops believe there are 2 more people involved in XXX's murder -- a judge has already signed 2 other arrest warrants. As far as we know, those 2 suspects have not been taken into custody yet.

XXXTentacion was gunned down Monday afternoon in broad daylight as he sat in his car outside of a motorcycle dealer. Cops have also gathered surveillance footage to aid in their investigation.