Last week, the owners of a shooting range in Grantville, Georgia, and their teenage grandson were shot and killed, according to police.

In a statement Friday night, the Georgia Bureau of Investigation said that 21-year-old College Park resident Jacob Christian Muse was charged with 3 murders in the April 8 shooting deaths at the Shooting Range in Atlanta.

According to the GBI and family, Evelyn Hawk and Tommy Hawk,  both 75, were killed at the family company, as was their grandson, Luke Hawk, 18. Officials said they were all shot to death, and roughly 40 firearms were stolen in the process.

A spokeswoman for the bureau confirmed that Muse had been detained on Friday. The facts and inquiry into his arrest were not made public.

The GBI stated in a statement, “this joint investigation remains active and ongoing.”

According to online records from the Coweta County Jail, Muse was being detained without bail. Whether or not he had counsel there to speak on his behalf remained unclear.

Coweta County Coroner Richard Hawk, son of the Hawks and father of Luke Hawk, discovered the bodies.

Richard Hawk, the Coweta County Coroner, found the corpses of his parents and son April 8 when he couldn’t contact them at the family business and went to their business facility, he said Monday.

Georgia’s College Park is located around 40 miles southwest of Grantville.