>> mason: a report this week by a grand jury in california e rongly urges the police to ease up on high-speed chases, which put bystanders at risk. jamie yuccas reports from the car chase capital, los angeles. >> look at that, look at that aggressive hit! >> reporter: it happens here almost daily. cgh-speed chases, sometimes reaching more than 100mph. >> whoa! >> reporter: up above, just about every police pursuit on the streets of los angeles is kcbs helicopter reporter stu mundel. >> bam! right there! my biggest fear is that somebody is really going to get hurt or die, or there's going to be some extremely innocent person injured. whoa, look at the kid, look at the kid! >> reporter: for good reason. says a new l.a. county grand jury report, which analyzed more than 400 police chases over one ten, one in ten resulted in someone being injured. three people died. nationwide, more than 90% were