>> reporter: the hunt was on for a suspect in the strangulation murder of melissa lewis. the lawyer's body was found floating in a canal two days after she went missing. as they always do, detectives looked at the circles she moved in. was there something in the background of my victim here that accounts for what's happened to them? >> we don't think so. she doesn't live a high-risk lifestyle. she's a prominent attorney. she's safety conscious, you know, she carries her pepper spray. >> reporter: melissa specialized in people with gripes, employment lawsuits --