controversial distribution of questionnaires to 110 "persons of interest", including various confrontational enquiries such as "Are you the killer?" Another was its reliance on international experts and use of an imported lie detector machine. Further, one of its officers accepted an offer by David Birnie to assist the investigation. Criticism was also laid on its overly narrow focus on the initial prime suspect despite the lack of direct evidence (as occurred in the cases of Andrew Mallard and Lloyd Rayney). Over its lifetime, Macro had 11 police reviews, including one in August 2004 led by Paul Schramm, the officer who had led the Snowtown investigation. It was finally wound down in September 2005 and the investigation moved to the Special Crimes Squad. Suspect In April 1998, a public servant from Cottesloe, Lance Williams, 41, was identified by police as the prime suspect, after his behaviour attracted their attention (for instance, driving around after midnight and circling the Claremont area up to 30 times) during a decoy operation. Subjected to a high level of surveillance and police pressure over several years, he continued to maintain his innocence. After interviewing him six times at length, police declared in late 2008 that he was "no longer a person of interest". He died in 2018. It was reported that police also investigated whether Bradley Murdoch may have been involved, although Murdoch was serving a custodial sentence from November 1995 until February 1997. In October 2006, it was also announced that Mark Dixie was a prime suspect in the killings, and that Macro had requested DNA samples. However, WA Police Deputy Commissioner Murray Lampard was later quoted as saying: "Dixie was closely investigated at the time and eventually ruled out as a suspect." On 22 December 2016, Bradley Robert Edwards (b. 1968) was arrested at his Kewdale house in relation to the deaths of both Rimmer and Glennon. The next day, he was charged with both murders. According to ABC News, he is believed to have had no previous link to the case, though he had pleaded guilty to the aggravated assault of a social worker at Hollywood Hospital on 7 May 1990. He was also charged in relation to two other attacks: the house break and enter and unlawful detention of an 18-year-old woman in Huntingdale on 15 February 1988 (where a stolen kimono with his DNA was dropped as the attacker fled), and