(more spoilers) Oh, I thought he did in one of the paths he told Past Todd to leave him with Angela, the park scene after the concert. I completed all the endings 6 years ago so I didn't remember that he didn't actually commit the crime.
(more spoilers) He never actually does it anyway. In the future "real world," he walks up to the line, freaks out, and uses the earpiece to go back to "the past" because he feels safer there, with everything more within his control. He's mostly evil, but not 100%. There's a fragment that isn't beyond redemption, both within his past self and within how he reacts to his own behavior, which he doesn't even fully understand (he has a bit of a mental breakdown over who he is in a couple of the paths).
Fun fact: Future Todd's character was inspired by Biff from Back to the Future. There's that scene in Back to the Future where Biff is in the car with Marty's mom, and the movie just kind of glosses over the implications there, but it seemed like a character element that perhaps deserved a bit more attention, given the gravity of what Biff was trying to do there. Another fun fact is that Biff's character was inspired by Donald Trump ( http://www.thedailybeast.com/articles/2015/10/21/how-back-to-the-future-predicted-trump.html ). So, with only two degrees of separation, there's a pretty direct line between Donald Trump and Future Todd. Something to keep in mind this November, I guess!
I don't have any ideas for a direct sequel. Every idea I had for this story was incorporated into a path or ending somehow. I kept adding new paths until I ran out of ideas, so I'm all tapped out now!
Thank you for updating the info! I played this last summer (I'm from South America so it was your last winter) and I been waiting for a sequel since the first day you published you were working on it! :D thank you again
Argh, I really need to start working on the second one again. I've been a bit stuck for a few months. I'm going to try to use this comment to motivate myself. (To be clear, though, it's not a sequel.)
preid, I played Alter Ego. I invested some hours in it. I died trying to help a boy that fell of a cruiser. It's quite nostalgic when you think about all the things you did in that life :( like watching a movie...
 "Thousand Dollar Soul"){kind=icon}
 "Hex Empire"){kind=icon}
 "The Ice Temple"){kind=icon}
 "Step Seq."){kind=icon}
 "Memoir Text Adventure"){kind=icon}
 "Alice is Dead - Ep 1"){kind=icon}
 "Reincarnation: A Taste Of Evil"){kind=icon}
(more spoilers) He never actually does it anyway. In the future "real world," he walks up to the line, freaks out, and uses the earpiece to go back to "the past" because he feels safer there, with everything more within his control. He's mostly evil, but not 100%. There's a fragment that isn't beyond redemption, both within his past self and within how he reacts to his own behavior, which he doesn't even fully understand (he has a bit of a mental breakdown over who he is in a couple of the paths).