After carefully going over the logs, Turtlx was confirmed to be doing other activites during Yas's casino raid, and one of them included murders in the spawn district. No evidence was provided to support the possibility of you witnessing such crimes, but evidence
was provided for Turtlx's arrest during an interaction he was having with another player while
not being wanted and for that reason the punishment is valid.
As a last note, your rapsheet is not in your favour and considering being issued
several bans over the course of a couple months I strongly advice you to rethink of how you compose yourself in the future as any followed punishments will not be as light.