What do you do when you still can't catch a killer, even though he tells you everything he's doing?

A new serial killer is on the loose in Santa Barbra. The catch? He tweets his crimes in real time. T for future violence and whump. Shules.

There are 80 years in an average person's life. 365 days in a year. 24 hours in a day. 60 minutes in an hour. 60 seconds in a minute. All together, that's 2,522,880,000 seconds. 2,522,880,000 moments. 2,522,880,000 thoughts and feelings and experiences. Each is a penny in the fountain.

There probably will be spoilers for future episodes, but I'll put a warning at the beginning of each chapter.

How different would Santabarbaratown 2 be if Shawn had arrived a few moments earlier?

When Shawn is shot instead of Henry, what will the retired detective do to find Jerry Carp and bring his son's assailant to justice?

Warning: Big spoilers for Santabarbaratown 2. If you haven't seen the episode, this will ruin it for you.

 *A response to Silverluna's challenge on the forums. What if Shawn was shot instead of Henry.*