When his misdeeds were revealed, Kent Paedophile David Mason demanded to be locked up; his wish was granted by indefinite detention.
Amazingly, Kent County Council neglected to do enough checks on the art instructor with a history of abuse, allowing him to foster a 14-year-old girl.
To obtain a new one, David Mason, a violent convicted paedophile, misled an MP about his identity and feigned to have amnesia.
Unaware of his past, the MP fought for him to change his name to David Matthews and obtain a fresh national insurance number.
This allowed him to raise a 14-year-old daughter of friends.
Social workers let her move in, neglected to confirm his identity correctly, and even set up her child benefit to be transferred.
However, his identity was discovered only in July 2009 upon his arrest and exposure.
David Mason admitted rape among 24 allegations of horrifying acts against children between the ages of five and fourteen.
David Mason had before spent three years in 1982 imprisoned for mistreating a Boy Scout.
If you or anyone you know have been affected by the people highlighted in this article, then please report those individuals to the Police on 101 (999 if an emergency) or visit their online resources for further details of the options for reporting a crime. You can also make a report at Crimestoppers should you wish to be completely anonymous. There is help available on our support links page.