this was such a violent attack on kim dorsey. did that tell you anything, just the level of violence? >> yes. it told us that there was possibly some sort of connection between the person that committed the act and kim. >> reporter: that they perhaps knew each other? >> that's correct. >> reporter: and this was some kind of -- >> rage. >> rage. >> reporter: crime of passion. >> right. >> yes. >> reporter: the bloody scene made them skeptical about the story kim's husband had told the 911 operator. >> you ask yourself, how could he believe she committed suicide? how could he actually believe that? when you look at that crime scene. >> reporter: that was only one of so many questions they had for derrick dorsey, a man it seemed with plenty of stories to tell. >>> coming up -- >> he was living two different lives. >> a husband with a secret. >> i said, what about a girlfriend? you got a girlfriend? and he readily said there's a lot going on here. >> we really had to figure out what was his, you know, true passion, did he want to live