I'm the detective.
Here are my investigations:
Day 1) Ocelot
Day 2) Fred (gangster)
Day 3) Nobody (I was jailed). This is the only day I didn't send an early request.
Why am I revealing myself? I'm quite positive that I was one of the top whack targets in the first place. But now that the G's know the D didn't make any investigations today, I'm basically screwed. So I had to make this post now, right after the whack (not before, just in case the G's managed to whack the bodyguard).
Also, notice how close to the whack this text was posted. I wanted to make sure I made this post before the G's found out who the detective investigated today (nobody) and Fred had a chance to claim he was the detective. Right now - when this post is online - the G's still haven't heard from Kate who the detective investigated.