Earlier, Oakland County Sheriff Michael Bouchard detailed the arrests of James and Jennifer Crumbley, the parents of a 15-year-old boy accused of shooting dead four at his Michigan high school pleaded not guilty to charges of involuntary manslaughter at an arraignment hearing Saturday, after police found them overnight hiding in a building in Detroit. Stay Connected Forbes on Facebook: http://fb.com/forbes Forbes Video on Twitter: http://www.twitter.com/forbes Forbes Video on Instagram: http://instagram.com/forbes More From Forbes: http://forbes.com