ghosterl: Mild first 15 minutes of the game spoiler ahead:
There's a recorded statement about who killed Simon and why and it is accessible right from the start by using the search term DEATH, of all things, to find it. Think about it, why would a detective search through videos where a believable witness states exactly what happened with Simon? Boredom? ;)
The real fun and mystery is hidden somewhere else, or at least it was for me, and it isn't solving a case that's obviously been solved for eleven years... :)
Mild spoilers as well:
Huh, so I did the search for "death". I already found all the clips, just did this to check if that was a viable "shortcut" - the thing is, the clip you're probably referring to isn't about Simon's death at all? As far as I am concerned there are 4 (possibly even 5) deaths mentioned in the game, at least one of which we know was a murder... I agree with your overall sentiment, though, the real fun is in trying to figuring out how everything fits together ;)
I thought I had it pretty much figured out after 10 minutes or so, but then I found another clip, and another one... and so I started rethinking and rechecking... So, definitely worth to continue playing even if you think you have all the answers already ;)