(WXYZ) - Retired Michigan State Police trooper David Balash is an explosives expert who spent years dealing with bombs.
He joined Stephen Clark and Carolyn Clifford on 7 Action News at 6pm to give his insights on the bomb and the investigation.
YOU CAN WATCH THE INTERVIEW IN THE VIDEO PLAYER ABOVE
Copyright 2013 Scripps Media, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.