Prosecutor: Was there anything suspicious about the defendant's behavior?
Officer: Yes. He was surprisingly knowledgeable about computers and hacking, and was very quick to provide several reasons why it couldn't have been him, as if he had rehearsed ahead of time.
...
Prosecutor: Are the defendant's reasons plausible?
Expert Witness: No. It's true that the average person would have had difficulty performing those actions within five minutes. But it would be easily possible for a technically skilled user such as the defendant. (Proceeds to demonstrate a "simulation" of the hack in a few minutes).
And heaven help him if it turns out the victim was a friend-of-a-friend on Facebook; then they'd have him "lying" in the first thing he said to the police.