Unfortunately this screenshot gives more evidence against Col_Boss than it does THE_BIG_DEAL. I can't tell if it was an accident or intentional from the evidence you have given me, and the log banter doesn't have anything that pops out as anything that could be a pattern of trolling nor teamkilling. If you had a screen of the actual point of explosion that showed no enemies around I might be able to do something.
I will not be banning at this time.