The accused are 18-year-old Juan Garnica Jr., 19-year-old Enrique Prado and 20-year-old Jose Becerra.
Police say that the victim, Abigail Villalpando, 18, knew Garnica and Prado.
Garnica allegedly beat her with a hammer then burned her body and dumped it.
Police have not said anything about a motive.
Garnica is charged with first-degree murder.
The others are charged with concealment of a homicide.
