Prosecutors say a man accused of possessing the gun that was used in the homicide of a 15-year-old girl in Round Lake Beach was on probation for an armed robbery case, a sentence he received just months ago.

Lake County Major Crime Task Force Spokesman Christopher Covelli announced in an update Saturday morning that Round Lake Beach police detectives and Lake County Major Crime Task Force investigators reviewed video surveillance from several cameras in the area of the Wednesday shooting that killed Valeria Rodriguez, 15, of Round Lake Beach.

Investigators determined that Shorbonia Poole Jr., 19, who lives at the home where the search warrant was conducted, possessed the firearm that was used in the homicide, Covelli said.

The Lake County State’s Attorney’s Office approved the charge of unlawful possession of a weapon by a felon, a Class 2 felony, against Poole Jr.

Covelli said additional charges are expected pending additional forensic information.