Tracking a Hero Killer: 3 Suspects

EW had a writeup after Episode 2 of Heroes, in which they discussed the direction this season has taken so far, including the focus on "older heroes" being targeted by a mysterious serial killer.

"Kaito Nakamura is dead, but possibly not gone for good. Angela Petrelli is also marked for death. But assuming that the hooded hoodlum who's doing the oldie-offing is Nathan Petrelli — in addition to last week's clues, we all heard Parkman and his boss, played by the mighty Barry Shabaka Henley, surmise that whoever pushed Kaito off the roof seemed to just fly away — would the guy whack his own mother? Maybe so, if he's holding onto some weird oedipal thing because, um, hello? We learned in the interrogation room that mom and Kaito were once lovers! And moments later, something scary popped into that room that made the normally icy Angela Petrelli scream and thrash like a rubber-roomer." (Full EW commentary here)

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Early on it seemed a strong possibility that Nathan Petrelli was the serial hero killer, but it seems a little less plausible now. After seeing Nathan in the police station with Detective Parkman when his mother Angela Petrelli was attacked, it makes it hard to believe he's the top suspect (unless...). The question remains who can this serial killer be?

Here's 3 reasonable suspects that could be the culprit:

1) West - Claire's new love interest perhaps? This could be far fetched, but the killer seems to have the power of flight, which West definitely has. Not only that but quite possibly West was the one who killed HRG (Mr. Bennet) in that #8 painting we saw on Episode 3. So that very well makes West a prime suspect as the hero killer.

2) Mr. Petrelli - That's right, Nathan and Peter's dad. How can anyone be sure he's truly dead based on the words of others? Maybe he was never killed and the whole death was faked, so he could elude Linderman. Or even better, Linderman was in on it and convinced the father to be part of the whole elaborate "blow up the city" plot. If it's true that Kaito Nakamura and Angela Petrelli were lovers, that provides enough motive for Papa Petrelli to be doing these heinous crimes of passion and revenge.

3) Nathan Petrelli - Is it possible Nathan has some other powers beyond flight? For example, can he teleport? This would put him at the scene of the near crime where his mother was attacked. Can't rule him out completely, because he surely has the motive to be the one doing this.

In comic books and superhero shows, nothing and nobody can be ruled out, but the above 3 characters seem to have motive and ability to commit the crime. Of course that can all be thrown out the window if the killer is someone we have yet to meet. Also this raises the other interesting question, is this killer the same person that is haunting Molly Walker in her dreams? Or are the two unrelated? You decide.