Police received more than 100 calls from members of the public.
The last contract included two years in which the police received no pay increase.
The police have received no claim of responsibility from any group, he said.
However, the police did not receive any specific order to "hold back".
The police received some 60 calls, which helped lead to the men's arrest.
As of June 2011, the case remains open and police have received no recent leads.
The police received a report of a child in a van with two adults.
"But the police received no description of the sort that you have just given to me."
The police receive daily reports about the increased rate of crime.
A short time later, the police received a call about gunfire at the house.