convinced liz golyar killed cari, in an attempt to get dave kroupa back. the sender was dave's ex-wife amy. detectives begged to differ otherwise, and they needed cari's car. they found it in another county. >> there was a dark red stain right on that seat. red stain. >> they tested it. human blood. they tested that blood. cari's blood. >> we high fived. we didn't know what to do next for sure. >> they had to move fast because it appeared liz was scouting a new target. >> we would see her scouring the