secret observation

See: espionage
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Pc Salt left his secret observation post to go drinking at a pub with colleague Pc Mark Berry before he died.
The 28-year-old fled to Spain after jumping from an upstairs bedroom window when police raided one of the gang's crack factories in City Road, Anfield, after hours of secret observation.
He had been watched for hours by a secret observation team who called in the hit.
In an interview, Harry had earlier told how the secret observation of the Taliban was the key to winning the battle against them.
Secret observation of a person, group or nation -- yes, spying -- has been going on since time immemorial.
A secret observation written in a diary describing the 1854 collapse of a great suspension bridge over the Ohio River in a windstorm draws a parallel to some of the food industry's past misfortunes: "Lunging like a ship in a storm, the deck rose to nearly the height of the towers, then fell, and twisted and writhed, and was dashed almost bottom upward.
During 2007 there had been a number of complaints from addresses on the defendant's walk about not receiving mail and in December last year he was kept under secret observation.
The warder had been under secret observation for six weeks
During 2007, he said, there had been a number of complaints from addresses on the defendant's walk about not receiving mail and in December last year he was kept under secret observation.
The "perfectly ordinary" semi-detached property in Erdington was kept under secret observation by police who saw a steady flow of clients, the Birmingham Crown Court heard.
He was caught after being kept under secret observation by post office investigators, the city's magistrates were told.
Police keeping secret observations on the premises recorded 999 people visiting it during just one week.