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The disappearance of a serving police officer is being investigated by Scotland Yard's homicide unit
PC Gordon Semple was last seen on Friday afternoon near London Bridge, but failed to return to his home in Dartford in Kent later that night.
The Met officer's partner reported him missing after he failed to return home from work and the last known sighting of him was at 3pm on Friday when he was seen on CCTV on Great Guildford Street near London Bridge.
He had been at the Shard earlier in the day, leaving at about 12.30pm, and detectives want to find out where he went between that time and the last time he features on CCTV around two and a half hours later.
Scotland Yard says the investigation to find the 59 year-old is still a missing person's inquiry, but concerns for his welfare mean the Homicide and Major Crime Command is now leading efforts to find him.