APACHE JUNCTION (AP) — A toddler was doused with gasoline and burned to death after her father told her they were going to look at Christmas lights, authorities alleged Friday.Kristen Salem was found dead alongside a street near Apache Junction about 6:30 a.m. Friday.The 2 1/2-year-old was picked up from day care on Thursday by her father, Shawn Grell, 24, of Phoenix, investigators said. The girl was reported missing when her mother arrived to pick her up from day care and Grell had already taken her.Sgt. Dave Trombi, a Maricopa County sheriff's spokesman, said Grell told the girl they were going to look at Christmas lights. Grell then drove to a Target store where he purchased a gasoline can, then stopped at a McDonald's and finally a gas station where he filled the container, Trombi said.Next, Grell drove around until his daughter fell asleep in the car. He then allegedly stopped the car, placed his daughter in the dirt of a desert area near a church and doused her with gasoline. As the little girl began to wake up, Grell lit her on fire, Trombi said.According to evidence, the girl appeared to have crawled 10 feet from where she was set on fire, he said.Grell was pulled over early Friday and arrested on suspicion of driving under the influence. He was released from jail but then went to authorities and turned himself in to a Capitol police officer.Trombi said Grell admitted killing his daughter to investigators."He had no reason. He had no answer," Trombi said. "He basically said he didn't know why he did it. We looked at the obvious things like domestic relations and problems but there were no indications as to domestic problems."However, Grell had been upset about being fired, according to an arrest affidavit filed with Maricopa County Superior Court.