Investigation: Dentist's 'horrifying' abuse of daughter with special needs

A disturbing video obtained of an east Valley dentist abusing his mentally incapacitated daughter is hard to watch. The victim is a young adult with a mind of a child and her father?s arrest didn?t happen until weeks later. Why did it take so long to alert authorities? It all started with a tip FOX 10 Investigator Justin Lum received about a well-known dentist charged with abusing his own daughter who has special needs. We have the evidence from Gilbert Police, and we want to warn viewers, the video of this abuse is tough to watch.