Crawford County authorities are interviewing witnesses today to determine a motive for a shooting which left four dead in Alma.

Police say a grandfather killed his two grandchildren and his daughter’s boyfriend in a shooting Tuesday afternoon in rural Crawford County.

Crawford County Sheriff Ron Brown said Tim Adams, believed to be in his early 50s, then killed himself after shooting his 4-month-old grandson, 4-year-old granddaughter and the boyfriend of his daughter.

Brown said when Adams’ daughter, boyfriend and two children drove up to the home Tuesday afternoon, Adams came outside carrying a gun. He fired a shot, wounding the woman’s boyfriend, and then shot the 4-month-old boy, who was in a carseat in the back seat of the vehicle, Brown said. The woman grabbed the wounded infant and exited the car, running into the home, Brown said.

Adams pursued her, firing shots as she fled with the infant, before he returned to the front yard and shot his 4-year-old granddaughter, Brown said.

"(The boyfriend) was in the front passenger seat of the vehicle when he was shot," Brown said. "He exited the vehicle after being shot and died in the yard. It looked like he tried to run into the house as well."

Adams’ daughter was not wounded, Brown said.

Alma police received a call shortly before 3 p.m. regarding a shooting with one or more victims. A sheriff’s deputy responded at 2:56 p.m. to 2127 Old Rudy Road and found a man and 4-year-old girl lifeless in the front yard, Brown said.

"There was a lot of chaos and yelling from the mother of the victims," Brown said, and the deputy went through the house and into the backyard. The deputy found Adams speaking on the phone with his back to the residence. When the deputy spoke to him, Adams turned around with a long gun in his hands and then shot himself, Brown said.

Brown, who was an Alma police officer for 15 years, said he has known Adams a long time. Adams operated a roofing business from the residence, which he owned, Brown said.