roc it turned out was a man that spelled trouble for karen in the past. >> roc was an ex-boyfriend karen pannell had problems with previously. >> and whoever and wherever this roc was, he'd just become the prime target of the investigation into her murder. >> okay. well, there it is. that's what she meant to write was roc. they have to follow that lead, and off they go. >> to find roc? >> to find roc. >> coming up, mission accomplished. find him, they do. >> what do you think she saw in you? >> the bad boy kind of thing. >> what would they find next? >> i'm looking at murder, somebody's talking to me about a murder. >> when "written in blood" continues. n "written in blood" continues.