Sister-in-Law of Dad Accused of Shackling Children Says He Used to Watch Her Shower

These Sunday, Jan. 14, 2018, photos provided by the Riverside County Sheriff's Department show Louise Anna Turpin, left, and David Allen Turpin. Authorities say an emaciated teenager led deputies to a Perris, Calif., home where her 12 brothers and sisters were locked up in filthy conditions, with some of them malnourished and chained to beds. Riverside County sheriff's deputies arrested the parents David Allen Turpin and Louise Anna Turpin on Sunday. The parents could face charges including torture and child endangerment. Riverside County Sheriff's Department via AP

A new sickening allegation has emerged from the alleged shackling case in California.

David Allen Turpin, 57, and Louise Turpin, 49, were arrested recently after sheriff’s deputies in Perris found their 13 children shackled inside their home.