Detectives on Monday questioned an artist linked to the Detroit studio where the parents of a 15-year-old accused Michigan school shooter were arrested after a manhunt, local law enforcement officials said. Andrzej Sikora, 65, was not arrested after a two-hour interview, the Oakland County Sheriff’s Department said in a statement, adding that detectives searched his home and seized several digital devices. “The issue for Detectives is what did Sikora know and when did he know it,” the sheriff’s department said. Ethan Crumbley, 15, was taken into custody last week after a shooting at Oxford High School in suburban Oakland County, some 30 miles (48 km) northwest of Detroit. He is being held without bail and charged as an adult in the attack, the deadliest U.S. school shooting of 2021. Four students were slain and seven other people, including a teacher, were wounded. Police, FBI agents and the U.S. Marshals Service …