This was tragic and will result in changes to charity rides.
A couple of points:
1. Another account said three other bikers had stopped for the red light and only this couple proceeded through the intersection
2. Neither wore a helmet; however, the cause of death was not specified.
I have been on this ride in the past and other "escorted" rides and it is easy to get a false sense of security which causes you to delegate responsibility for your safety to others. This you can not do; however, if the police are going to escort a ride they must do so properly.
As I said, this was tragic and I believe will result in changes both here in Az. and throughout the country in escorted charity rides.