Police have arrested a 17-year-old boy from Georgia and charged him with the murder of his mother and two young sisters, one of whom was the daughter of rap star Juvenile.

According to reports, police have accused Anthony Tyrone Terrell Jr. of shooting his mother, Gwinnett County Sheriff’s Deputy Joy Deleston (39 years old). The young high school sophomore also shot and killed Deleston’s two daughters, Micaiah, 11, and Juvenile’s four-year-old daughter, Jelani.

“It is heartbreaking to lose someone in the way that we lost her,” Gwinett County Sheriff Butch Conway told WSB-TV Channel 2. “I am very angry that these three lives were so violently taken from us in a totally senseless and cowardly act.”

Terrell is currently incarcerated at the DeKalb County Jail, where he faces three counts of murder, three counts of aggravated assault and other charges.