A former teaching assistant has been jailed for 16 years for 31 sexual offences against 18 children.
Jamie Chapman, 28, created "fake and false" Facebook personas of teenage girls to get vulnerable boys to send him naked images of themselves.
Having duped 18 victims in all, he then urged them to engage in sex acts.
When the victims refused, he would then threaten to blackmail the boys by sending their photos to school friends and family, Birmingham Crown Court was told
Chapman, 28, Chapman, of Tamar Drive, Solihull,admitted raping a child and a further 21 offences of causing or inciting sexual activity with children, and nine counts of taking, making and distributing indecent photos of children.