I'm new here,but heres my take......Christopher was a rat.......and this is a big strech......
remember when CM and Tony are driving and Christopher turns up the volume on the radio.
Perhaps he turned up the volume in order to help conceal the fact that his wire wasn't wasn't working right and Tony could hear some "feedback" or etc...

and in closing..when the accident happened......the SUV "rolled over"......just like a rat does...