MSU alumnus Tyler Aho, left, discusses a piece of evidence with Ingham County Assistant Prosecutor John Dewane, middle, and defense attorney Chris Bergstrom, right, during the preliminary exam for the teen accused of stabbing MSU student Andrew Singler to death, April 18, 2013, at Ingham County District Judge Donald Allen’s courtroom in Mason, Mich. Aho was Singler’s roommate and witnessed the altercation. Natalie Kolb/The State News