Army doctrine calls for a military police brigade to handle about 4,000 prisoners.
Other police brigades will be subject of internal investigations for any liaison with death squads or other groups.
The police have assigned 30 officers to a judicial police brigade to work such cases.
Four of the eight police brigades are to be deployed soon from Baghdad to the provinces, so building public confidence in them is critical.
The police brigade would be expelled from the Indian territory and all the prisoners released.
Under the scope set by his superiors, the inquiry was limited to the conduct of a military police brigade.
A special police brigade arrived to support a half-hour later, ending the fight, during which all four Lashkar-e-Jhangvi members were killed.
The police brigade subsequently met each Sunday between the two church meetings to "post each other in the line of duty."
"We are going to increase the number of police brigades around all the women's colleges," she told a visitor.
A half-hour after the shooting began, a heavily armed special police brigade arrived and finished off the surviving assailants.
