The Lexus had already rear ended a Prius before Bruce hit it.
According to local News, they are investigating why the Prius stopped in Traffic before being rear ended by the Lexus. The timing of this, and the fact that Bruce was towing a Trailer must be considered.
There is more to this story that has been reported. I would assume that a Cadillac Escalade had a Bluetooth Feature that allows you to Voice - Text, just as I can in my Dodge Challenger. I never need to touch my Phone.
http://www.freerepublic.com/focus/f-chat/3255204/posts?page=148#148
My bad eyes are missing it.
The Lexus was clearly in the left-turn lane, so how would that affect anything since Jenner was not (but slight over the line, perhaps).
Interesting.