Imagine this scenario:
You are an aspiring model driving home with your boyfriend when a heated argument starts. He stops the car and you both get out ; you stab him 42 times from which injuries he dies.
You have a press conference at which you say your boyfriend was killed in a road rage attack by a fat man with staring eyes who stabbed your boyfriend over 30 times emotionally you ask for anyone with information to come forward.
Why the kin hell would you want to make up a story like that and appear before cameras telling the tale?
I think I remember that case - an american girl. IMO it's often a case of "Look what I've done and I'm getting away with it."
There have been many killers over the years who have been on TV all the time lapping up the attention and are narcissists. This is unprecedented though and would they keep going to these extraordinary lengths? Maybe the true narcissist is also deep down hoping to get caught? All that extra attention when caught like the court case, post prison interviews etc.
FWIW I don't think that to be the case here. There's always a counter argument though and there are many examples of killers basking in the limelight. I can think of several examples, but terrible with names. 1 guy taunted the police for years, was on TV all the time and when the case went cold handed himself into the police.