Police say the man facing charges that he killed the parents, grandmother and uncle of an infant found left in a western Tennessee yard last week has been arrested.

At the news conference Tuesday, Tennessee Bureau of Investigation Director David Rausch said the suspect’s girlfriend was related to the victims. Goodman later confirmed to CNN Drummond’s girlfriend and Rose were sisters.

Austin Drummond, who is accused of killing four members of a family and leaving their baby alive, abandoning it in a stranger’s yard in Tiptonville, Tennessee, was captured by police Tuesday morning in Jackson,