PERSON@1 , NUMBER@1 Production Pre-production The film is based on the novel by PERSON@2 , which was in turn based -LRB- although very loosely -RRB- on the crimes of LOCATION@1 serial killer PERSON@3 .

The film is based on the novel of the same name by PERSON@2 . This was inspired by the crimes of LOCATION@1 serial killer PERSON@3 .
