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.
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.
In an interview, Harry had earlier told how the secret observation of the Taliban was the key to winning the battle against them.
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
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.
But their plan was discovered and they were arrested following secret observations carried out by officers from MI5.
But security services found out what was going on and following a week-and-a-half of secret observations by police officers and officers from MI5 the two men were arrested.
Undercover officers had been keeping secret observations on Hussain and at 4.