Suspicion
From Tardis Wiki, the free Doctor Who reference
Step 2 of Victor Kennedy's basic surveillance and espionage strategy was to get on first name terms with the target without provoking suspicion. In the case of Elton Pope, this was inadvertently achieved when Jackie Tyler told him her name after first asking him for a quid in exchange for two fifties at the Wash Inn. (PROSE: The Time Traveller's Almanac, Love & Monsters)
The webmaster of Who is Doctor Who? believed that the police's "net of suspicion" had closed around him when they took him in for questioning, not for the first time, (PROSE: Rose sighting confirmed) about the disappearance of Rose Tyler. (TV: Aliens of London)