[CO] Picked up on "FOJ/ASSAULT 2 - PEACE OFFICER"

I have no recollection of ever having done anything to justify a charge like this (I'm a wimp, hitting a cop isn't at all characteristic of me). The warrant was issued on 4/20, but I hadn't been in the state for all of March, and they can't tell me the actually date of the offense. I haven't been in trouble in a decade and that was minor kid stuff.

Going in on Monday so they can hopefully explain WFT I allegedly did wrong. The only day I spent in jail was when they found the warrant (after a minor fender bender).

Any clues as to what I'm looking at are greatly appreciated, my anxiety level is higher than Snoop and (good or bad) any thoughts are appreciated.