Cops are usually wrong when it comes to bike accidents.

Cyclists faulted most in bike-car crashes

Records show 2,515 bicyclists hurt or killed in county in crashes with cars since 2011

[…] According to the 2,515 accident reports on crashes between cyclists and motorists resulting in the injury or death of a bicyclist in San Diego County from 2011 to September 2014, it was the cyclist who was most often found at fault, when fault was determined. […] “Investigators, however, have never provided a reasonable explanation how (the cyclist), struck from behind, shares responsibility for his own death,” the BikeSD website said. […]