The parents of the suspected Michigan high school shooter are being held on a bond of $500,000 each, after they were arrested on Saturday in a Detroit warehouse following a manhunt. James and Jennifer Crumbley pleaded not guilty to charges of involuntary manslaughter over last Tuesday’s mass shooting, which killed four students and wounded seven others at Oxford High School. Their 15-year-old son was charged last week with terrorism, murder and other counts. James Crumbley and his son went to buy the gun used in the massacre just days beforehand, and both parents are accused of giving their son access to a firearm even as he displayed obvious signs he was thinking about committing violent crimes.