In May 1985 , Knorr forced Sheila into prostitution to support the family .
Following Suesan 's death , Theresa Knorr began directing the majority of her anger and abuse towards her daughter Sheila .
In May 1985 , Theresa Knorr forced Sheila into prostitution to support the family .
Following Suesan 's death , Theresa Knorr began directing the majority of her anger and abuse towards her daughter Sheila .