The Brotherhood of Satan

The Brotherhood of Satan is a 1971 lowbudget horror film written, produced and starring L. Q. Jones It was directed by Bernard McEveety and also stars Strother Martin.

A local coven of elderly Satanists have been taking the children and leading them to worship Satan in a plot to use their bodies as receptacles for their own souls. They use their supernatural abilities to kill anyone who interferes by turning the childrens toys into instruments of murder.The priest figures out that the coven is taking the children, and tells people, including Ben and Nicky, because K.T. has gone missing. However, he sees the murder of a man trying to find his son, Joey. He goes crazy, turning into a blubbering mess. ........

Source: Wikipedia