Officials have now issued an arrest warrant for a teenager they think killed his grandparents in Manchester.
Officials are trying to locate 17-year-old Isaiah Sweet. He's wanted on two counts of first degree murder.
Police say the victims are 62-year-old Janet Sweet and 55-year-old Richard Sweet. Official documents say Isaiah is their grandson and lives at the home.
Those documents also say that Isaiah made a phone call to a friend Friday night saying he drugged his grandparents and couldn't find their pulses.
Neighbors say family member found the bodies when they arrived for a Mother's Day party Sunday.
Officials say if you have any information about Sweet's location, contact Manchester Police at 563-927-3355.