. >> that's why for seven years rick perez has been fighting for change. killed by a police officer in september of 2014. >> he was pretty toasted. >> his father says petey was never violent. police came to the liquor store on cutting boulevard, and petey was detained for intoxication and unharmed, and the cops claimed the 24-year-old reached for his weapon. his father says witnesses deny that claim. the city cleared the officer and so did a criminal probe by contra costa county's district attorney's office, and the family settled out of court. >> the police investigate themselves all the time and they assure us they did nothing wrong, and sometimes i wonder if that's the first thing they learn in the academy is how to cover themselves. >> there's a bill co-authored. >> this effort is personal for me. i have heard firsthand the hurt and pain so many families and communities feel in the moments after these incidents. >> officers will be opening up in northern and southern california, and he expect to investigate 40 to 50 deadly police shootings each year. >

. >> reporter: that's why for seven years, rick perez has been fighting for change. his son, petey, killed by a richmond police officer in september 2014. >> he was pretty toasted. >> reporter: but his father says petey was never violent. police came to the liquor store here. petey was detained for intoxication, and unarmed. words were exchanged. the officer claims the 24-year-old reached for his weapon. >> the cop actually searched him. >> reporter: police shot and killed petey. the city cleared the officer, and so did a criminal probe by contra costa county's district attorney office. the family settled out of court. >> these police investigate themselves all the time, and they always assure us they did nothing wrong. and sometimes i wonder if that's the first thing they learn at the academy is how to cover themselves. >>>> reporter: the california attorney general wanted to make sure more families didn't feel like the perezes do. he co-authored a bill that requires the state to investigate bedly police shootings of unarmed people. >> this effort is personal. i fir