In an article headed Cops Talk Funny, Val Van Brocklin points out some of the curious turns of phrase used by U.S. police in court. British police do this too, though not always using the same terms.

# He indicated… He said
# I have been employed by… I worked for
# I exited the patrol vehicle… I got out of the car
# I observed… I saw
# I ascertained the location of the residence… I found the house
# I proceeded to the vicinity of… I went to
# I approached the entrance… I went to the door
# The subject approached me… She came up to me
# I apprehended the perpetrator… I arrested the man
# I obtained an item that purported to be an envelope from the individual… I got the envelope from her
# I observed the subject fleeing on foot from the location… I saw him running away

She actually seems to believe that police could be trained not to speak like this.

(Via Boing Boing)