Twelve former residents of children's homes say they were abused by Lord Janner. [Janner], who died before a court could examine claims of child abuse against him, regularly visited homes in Leicester in the 1970s and 1980s. An ex-police officer says he reported suspicions about Lord Janner, a decade before police began a full inquiry. A trial of the facts", due to take place in April, has now been shelved by prosecutors. However, the BBC has traced and interviewed dozens of men and women who lived at children's homes in Leicestershire in the 70s and 80s. It has also spoken to [several people] involved in investigating the case of Frank Beck, a notorious care home manager who was eventually convicted of child abuse. He was sent to prison in 1991, where he died in 1994. During Beck's trial, he and an alleged victim both sensationally claimed that Lord Janner was a child abuser, and the alleged victim was then interviewed by police. A former detective, Graeme Peene, told the BBC that in the late 1970s he reported Beck, after seeing him rubbing a boy's groin at The Beeches children's home. He was later asked to go back to The Beeches to return another boy who had run away, and was directed to Beck's office, [where] Lord Janner ... was sitting in an armchair "and next to Greville Janner was this young boy". Mr Peene says he considered it "an unusual occurrence" which was "something I felt ought to be reported". His report was sent to divisional headquarters where, he said, nothing was done.