Consider
how many times you've read about a cop meeting a suspect alone or with only one
person 'backing' them up . . . . Hello? Who, while carrying a large sum
of money, would go meet a bad guy all by their lonesome? Definitely not another
bad guy. Trust is in short supply among criminals. In fact, the way most
undercover cops are 'outted' is by their willingness to do things a normal
crook wouldn't.

From
a Cop's Viewpoint: Investigations 101, is presented as combination anecdotal, source
and procedural for writers seeking to accurately portray Law Enforcement.