GRANTSVILLE, Utah (AP) — A prosecutor in Utah says he plans to charge a teenager accused of fatally shooing four of his relatives as an adult. Tooele County Attorney Scott Broadhead tells KUTV-TV that prosecutors still don’t know what the 16-year-old boy’s motive was in shooting the family in the small town of Grantsville on Friday night. Prosecutors are meeting with Grantsville police on Wednesday. Authorities have declined to release the suspect’s name or his relation to the victims before the charges are filed. Killed in the shooting were a 52-year-old woman and her three teenage children. The children’s father also sustained a gunshot injury