police began their forensic investigation by turning to dick munroe, a forensic geologist with the winnipege department. the murder weapon was a 55-pound concrete block found near the body. >> his trunk was full of concrete particles. that was exciting at the outset because you saw all this concrete. but the trick was can you match the concrete to that block? can you put that block in his trunk? >> the process was tedious. since there were hundreds of particles recovered from andronowich's trunk, all very small. >> because the murder weapon was rough, because it was a broken piece of concrete, you're looking for, like, a jigsaw puzzle, a piece that would fit onto it, that would get a physical match. >> but munroe was unable to find a match. next, police sent photographs of the victim's bite wounds to dr. david sweet, a forensic odontologist in vancouver. ed andronowich wore dentures which were also sent for analysis. >> the question that came up obviously was, can artificial teeth in the form of a complete upper and lower denture bite hard enough to remove human tissue? >> dr. sweet perform