Named Roc News Today

That blood splatter served as a gruesome canvass with roc written over it. >> when the letters roc was over top of it. it scribbled over it and didnt disrupt it at all. >> here was her specialization, roc must have been written after they dried, how long after? >> i have a special machine i used to make some spatter. >> in her lab, she used animal blood to test how long for spatter to dry on a similar surface. >> when i came back and was able to apply spatter to some sections of some cardboard, ...

After all, karen had been stabbed 16 times, an attack so ferocious, it could only be a crime of passion. now the detectives were desperate to figure out what their biggest clue of all meant, those three letters written in blood. roc. this is a creepy scene. i mean, you got this scrawled in blood message saying this is my killer. im now dead, you find this guy. thats what its suggesting, isnt it? >> absolutely, its what its detecting. >> detectives found how those letters were connected to the vi...

That did to her? thats a lot to put on your shoulders. >> right. i think that really affected herself esteem. frankly, i think it had an impact on the kind of men she was attracted to. >> karen came to rely on roc to take her to doctors appointments and injections. when she asked him to move in, her friends and family thought she was asking for trouble. >>ive think thats true. is it my place to say, well, you need to go find somebody that is going to offer you a better future? >> you cant dictat...

Person, is that a thing? the clues pointed in so many different directions, it really was -- it was a total mystery. >> reporter: theres a concept in the law known as a dying declaration. with those three letters scrawled in karens own blood lead to the apprehension of her killer? >> coming up, investigators dig into that three-letter mystery. who or what was roc? when dateline continues. s roc? when dateline continues. cold-eeze® can shorten your cold by 42%. it releases zinc ions that some sc...

>> youve got this message saying this was my killer just like youd see in a movie. >> and the ending, that was just like a movie, too. >> i cant believe what people do to each other. hello and welcome to dateline roc, in this case those three letters would tell a story all their own. the letters scrawled in blood above her body seemed like a beacon that could lead detectives to her killer. but what exactly did they mean, and what other crucial clues were hiding in plain sight? it would take a do...

>> okay. well, there it is. thats what she meant to write was roc. they have to follow that lead, off they go. >> to find roc? >> to find roc. >> coming up, mission accomplished. find him, they do. but what would they find next? >> im looking at murder, somebodys talking to me about a murder. >> when "dateline" continues. ins okay wipe pretty-please do your thing... nice! nailed it! huggies® natural care wipes, gentle like a hug. hugg on have a skincare routine. but what about a lip care routin...

It was a major development. karens ex had suddenly gone from being a prime person of interest to a victim himself. victim of the real killer who tried to frame him for the crime and was still out there somewhere. whoever killed her know somebody named roc. >> somebody knows my name. >> thats a part of the story. >> thats right f. you think about this, this is -- its not even a smart thing to do. >> reporter: roc was right. the pool of suspects had suddenly narrowed to a small handful of karens i...

I mean, it was a nice piece of furniture and i wanted to get it back. she pretty much said, you left, youre not getting it. >> he never did get. >> that rolltop was still in karens condo on the night she was stabbed to death. now, detective holbrooke pointedly wanted to know if roc had been there, too. >> he says, where were you on such-and-such a day. im like, well, first of all, ill have to look at the calendar because i dont know where i was that day but i guarantee you i wasnt in oldsmar. so...

>> cox bought similar gloves at a hardware store. after several more days of testing was satisfied that her hunch was correct. ana cox had come up with two important findings. the message in blood had likely been written with a gloved hand and it had been scrawled at least 20 minutes after the onset of the attack on karen. she reported her results to the detectives who by then had learned another pertinent fact about their victim. >> karen was exclusively left handed and her left hand did not ha...

He outsmarted himself and thats why he is in prison. >> roc is free to ride his harley these days, but it still eats him up that a man he never met tried to frame him for murder. if you could sit down and talk to him just the way were sitting here, what would you say to him? >> i am restrained, correct? i couldnt get to him? >> should we tie you to the chair? >> i would not be a good communicator in that conversation mode with him sitting there. i couldnt do it. >> mike pannell couldnt do it eit...