Reinvestigations of the man seen outside 37 Shorrolds Road with Lamplugh in July 1986, compared to John Cannan's arrest photo in October 1987. In 1999, an internal report by the Metropolitan Police criticised the handling of the original investigation and failure to further investigate Cannan. In December 2000, Cannan was arrested on suspicion of Lamplugh's abduction and murder and interviewed at
Hammersmith police station. Cannan did not provide interviewers with any information that could eliminate him from the inquiry and did not provide an alibi for his movements between 25 and 28 July 1986. It is believed that she placed the call because Cannan had convinced her that he would release her unharmed. and investigators not being able to dig in the area because of residential housing now standing there. that had been mentioned in several of the original witness statements. that there was insufficient evidence to charge Cannan with the murder. They also announced that all other possible suspects had been eliminated and that Cannan was their
prime suspect. The lead detective in the reinvestigations, Jim Dickie, stated that he was as certain as possible without conducting a formal judicial process that Cannan was responsible.
Links to Sandra Court murder When interviewed about Lamplugh's disappearance in 1988, Cannan had said that he knew a "Bristol businessman" who was responsible for "the murders of Shirley Banks, Suzy Lamplugh and another girl." Investigators believe that he was talking about himself, as he was previously convicted of Banks's murder. He had been in the prison hostel at Wormwood Scrubs at the time but was allowed to leave the facility at weekends and had access to a red Ford Sierra, the same car that was tested in the Lamplugh case. Court was last seen walking barefoot, appearing slightly drunk, at around 2:45 a.m. Her body was found the next day in a water-filled ditch several miles away. When the Ford Sierra was discovered during the Lamplugh reinvestigations of the early 2000s, two hairs were found inside that matched Court's DNA. However, the DNA evidence was not strong enough to bring a prosecution against Cannan for her murder. ==Steve Wright speculation and elimination==