Palatine has a police department with 92 employees, 69 of whom are officers. On Saturday, the department needed help.
Within minutes after seven bodies were found in a Brown's Chicken & Pasta, police contacted the Cook County sheriff's police for assistance. Palatine police also formed a multijurisdictional task force, calling upon the expertise of neighboring departments.
Often in major cases, the Federal Bureau of Investigation is brought in, not because the crime is a federal violation, but because flight across any state line to avoid arrest is a federal violation.
In what could be a telling note to the Palatine case, the FBI was not involved.
"They don't think flight is a possibility here," one source said.
While some investigators and evidence technicians inspected the restaurant's premises carefully, others were out near the garbage bins. Investigators in rubber gloves were collecting food containers there. One was going through the garbage.
Colleagues inside the restaurant wore coverings on their shoes so they would not bring anything into the building that was not there when the crime took place. In addition to normal photographs of the crime scene, the inside of the restaurant was videotaped.
The bodies of the victims, found in two walk-in coolers, were not moved for many hours to the county medical examiner's office on the Near West Side of Chicago.
Investigators dusted the doors and parts of the inside of the restaurant for fingerprints. The back door, employees have said, often was left open.
Two assistants from the Cook County State's Attorney's office were at the Palatine police station and the crime scene for most of Saturday, sources said. The prosecutors are consulted in the event that search warrants are needed.
If a search warrant is improperly drawn up, there is a possibility that any evidence found during the search might not be admissible in a trial.
And if any statements are taken from a suspect, an assistant state's attorney is present to be sure that the questions asked are proper and to assure that a statement will be admissible in court.
As with most homicides in Cook County, investigators from the medical examiner's office also go to the crime scene. But in this case, Dr. Robert Stein, the county's medical examiner, also traveled to the scene.