DALLAS — Relatives of a 10-year-old boy struck and killed by a police cruiser said Saturday they don't believe the fourth-grader would have steered his bike in front of the officer's car.Authorities said Senior Cpl. Michael Vaughn was not using his lights or siren Friday night when he hit Cole Berardi while driving toward a disturbance call. The boy tried crossing a poorly lit road when Vaughn rounded a short curve and struck the child, Dallas police Lt. Vernon Hale said.Eva Havens, the boy's aunt, and grandmother Katherine Karse cried Saturday while hugging each other in the family's yard. Both said they thought Cole was too smart to have crossed the four-lane road like that."He would not have done that,'' said Havens, 27. "He would have darted off and ran away if he had seen anyone coming.''Carrie and Brett Inman, Cole's mother and stepfather, said they were waiting for the results of the accident investigation. Their son had been riding to a convenience store down the street.Hale said another patrol car was following behind the one that struck the boy. The officers attempted to revive the boy but were unsuccessful. He described the officers as "distraught.''"It was just dark, and when he came around the curve, the only reason he even saw the kid was because of his headlights,'' Hale told Dallas TV station WFAA. "It was just too late to do anything.''Vaughn, who has been with the force since Oct. 2003, will be placed on administrative leave. Police said the accident report will likely not be complete for several days.A makeshift roadside memorial where Berardi was struck included stuffed animals and a toy truck placed by one of the children in the neighborhood. A friend of Cole's came by his house Saturday to give condolences to the family."He had just a passion and love for life and never made any bones about it,'' Brett Inman said. "He loved life and loved to live it.''