Piers Hopson, who had Asperger syndrome, went missing after saying he was going for a walk.

BBC: Missing Piers Hopson emails 'were unread for months'

"The whole thing could have been wrapped up by December 2010 if people had done their jobs properly, " his father, Roger Hopson, said.

BBC: Missing Piers Hopson emails 'were unread for months'

In particular, Mr Hopson questioned whether enough was being done to reform annual increments - awarded irrespective of pay deals as staff build up experience.

BBC: Health trusts call for urgent debate on national pay

"Microsoft employees are some of the best and brightest, but they're not known for being conformists, " says Stephen Hopson, a career consultant and professional speaker, in an e-mail.

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Pay takes up 60-70% of an average trust's costs, and safety concerns mean it is impossible to cut staff numbers in the same way as other public services, Mr Hopson said.

BBC: Health trusts call for urgent debate on national pay

On August 28, 2009, Mr. Williams confirmed that he had picked Ms. Bary up at the Hopson's residence on July 20, 2009 and drove her to the Columbus Greyhound station for her trip to Florida.

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In January 2010, Piers Hopson, 35, disappeared.

BBC: Missing Piers Hopson emails 'were unread for months'