The SPPD just handed us a cold case from a few years back. Take these files and go over them at the crime scene. The victim was an SPPD cop, back in the time of Commissioner Thirly.
A buddy of ours got away with murder a long time ago, but it looks like the Enforcers are re-opening his cold case. Prevent Enforcers from picking up any new evidence.
New witnesses say they saw the cop in two other locations the night he was killed. Go to the crime scenes, and update the case files with any new evidence you find.
Where the gun was stashed and the body turned up were key locations in that cold homicide case. Stop the Enforcers from investigating those crime scenes. Unless someone's built a mall on them...
Great work - looks like that SPPD cop was murdered by a colleague. Tsk tsk... Deliver the updated files back to the lockup for analysis.
The 'Forcers have just finished going over those crime scenes and updated a bunch of cold case files. Stop them from dropping off the files for analysis.
That cop-killing cop has hired help to screw up the last of the evidence. Secure these crime scenes: if we can uncover solid DNA evidence, we'll be able run it against the SPPD databases to find our killer.
Our homicidal friend is leaving town, but he told us where the 'Forcers will head next. Go to these crime scenes and contaminate them. Ruin the evidence so it will be inadmissable in court.