reporter: uncovered this while lookinn at the violence reports in the aftermath of the murder of christopher fenton. the investigation uncovered this deleted report and found that the police decided not to arrest the boyfriend 12 hours before he killed her. both cases involved the samm officer, corporal. andrew schmitt who is under internal investigation. >> 12 hours later she was murdered and corporal. schmidt is the person responsible for the failure. corporal. schmidt ? like i said we haven't been investigation we are looking at his actions in this case, he's a good officer and tries hard. we all make mistakes. >> chief said that denver 7 investigations have prompted a number of changes in his department including more domestic violence training. they will lay in a few minutes and he's taking questions at the littleton city council meeting, deep session officially begins at 6:30 pm and we will have an update at 10 pm. >>> convicted of driving drunk 6 times and is only punishment is probation, the da saas that this case sheds light on how lenient the dui laws and colorado can be. >>reporter: it d