Over the course of 18 months, three young women were killed in separate murders by violent ex-felons who were supposed to be closely monitored by Ohio's Adult Parole Authority. They weren't. Time and time again, WBNS-TV's investigative unit, 10 Investigates, found lapses in judgment and failures by the state's parole system to closely monitor these ex-felons. In one case, a Georgia judge's order to place a GPS ankle monitor on a twice convicted rapist was ignored. The reason: Ohio's Adult Parole Authority believed it would be too expensive. Six months later, the man was arrested for the rape and murder of a young woman. We also uncovered data showing part of the problem might be many of these parole officers are overwhelmed. State corrections records show there are 450 parole officers in Ohio tasked with monitoring 37,000 ex-prisoners who are under some type of post-release supervision. Given that workload, it's hard for anyone to understand why these parole officers would be assigned to watch an empty parking lot. But that's where we found some of them sitting every day, for nearly a month. Our reporting on this issue has already changed state law and led to the ire of some state lawmakers who are calling for additional changes.