Ken manages to convince the event security that if they stay back he can get Richard out without causing a fuss or damaging the vehicle. They move back to a discreet distance and indicate that Ken has until the locksmith arrives. They also indicate they want the stolen wallet and they want Richard taken straight outside.
Taking advantage of the fact that the security has moved back (and he has a spark plug), Ken then manages to convince Richard to pass the stolen wallet out after lowering the window a crack. This is good enought to help defuse matters somewhat, and it is then easy for Ken to convince Ricahrd that now is a good time to leave without being bashed senseless by the security guards.
Having helped a rather relieved Richard get safely outside, Ken gets a phone number he can contact him on about better paying future work. In his most sensible course of action all night, Richard leaves the event and heads home.
Upon returning Ken has a brief chat with one of the senior event security staff.
My thanks sir, that was well handled and certainly got my staff out of an akward situation. I'm trying to get more of my staff to understand the importance of communicative conflict resolution, but to be honest I think they prefer to hit things.
My name is Steven Howard, I'm an event security co-ordinator with Pheonyx Engines. If I can assist you with anything tonight please let me know.
GC Note: Although I'm not sure you would have been able to remove the spark plug without tools, I thought it was a good idea. So I've allowed it and awarded a bonus action dice.