Three people suspected of beating a 15-year-old Spokane Valley boy with a baseball bat were arrested Friday evening. Tyson N. Taylor, 22, and two unnamed juveniles face first-degree assault charges for the June 15 beating that left the boy in Sacred Heart Medical Center for most of the week. Taylor is being held in the Spokane County Jail on a $25,000 bond. A passerby found the boy unconscious and called 911 just before 11:30 p.m. near the 600 block of North Farr Road, according to the Spokane County Sheriff’s Office. Tinese Burnett said her son, whom she asked not be named, suffered a fractured skull after being struck in the forehead with a metal baseball bat. He is recovering from brain surgery and has several stitches on his left shoulder and right leg. Burnett said she and her son knew several of the suspects. Investigators are searching for a motive in the attack. Deputy Mark Gregory said more arrests may be made as the investigation continues.