Thrill Kill Planned News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Prosecutors were pretty sure ashlea's murder was a thrill kill planned by a sadistic young woman who thought she was smarter than everyone else. but tiny, meek, carter cervantez admitted none of that. she still had a plan, concocted all by herself, to explain why she, too, was a victim. coming up -- a vicious killer? >> reporter: you wanted to see the death penalty? >> death penalty was what i wanted. >> or a young woman forced into a life of crime? >> were you in pain? >> yes. i was screaming. >> when "dateline" continues. here, safe driving saves more than just your cargo. ♪ ♪ safe dri...

Me. >> reporter: the brutality of the murder was never far from the prosecutors' minds. >> i think i just thought how painful and how awful the last few minutes of her life would've been on this earth -- >> reporter: how terrifying. >> and absolutely terrifying. absolutely terrifying. >> reporter: even that, they said -- even that appeared to be part of the plan. this wasn't just about robbery, or even revenge, said prosecutor rousseau. >> it was discussions that carter cervantez had had with people where she expressed certain -- i guess you would call them fantasies involving killing people. ...

Into the room where monica was. and she was consoling me. and she shouldn't be consoling me. >> reporter: the brutality of the murder was never far from the prosecutors' minds. >> i think i just thought how painful and how awful the last few minutes of her life would've been on this earth -- >> reporter: how terrifying. >> and absolutely terrifying. absolutely terrifying. >> reporter: even that, they said -- even that appeared to be part of the plan. this wasn't just about robbery, or even revenge, said prosecutor rousseau. >> it was discussions that carter cervantez had had with people where ...

The murder was never far from the prosecutors' minds. >> i just thought how painful and how awful the last few minutes of her life would've been on this earth -- >> reporter: how terrifying. >> and absolutely terrifying. absolutely terrifying. >> reporter: even that, they said -- even that appeared to be part of the plan. this wasn't just about robbery, or even revenge, said prosecutor rousseau. >> it was discussions that carter cervantez had had with people where she expressed certain -- i guess you would call them fantasies involving killing people. >> reporter: liza schoenthal remembers one...

>> it was discussions that carter cervantez had had with people where she expressed certain -- i guess you would call them fantasies involving killing people. >> reporter: liza schoenthal remembers one such discussion at work. >> it was just us. and we were folding clothes, and she mentioned that she had thought about killing someone before and whether or not she could watch them die. >> reporter: as if the murder wasn't shocking enough, prosecutors were pretty sure ashlea's murder was a thrill kill planned by a sadistic young woman who thought she was smarter than everyone else. but tiny, mee...