Now, if Gainer had said, "It's pretty obvious if they were prime candidates or suspects, we would be on them like a cop on a donut." I would have to take him seriously.
Here's another theory: What if the DCPD was
supposed to find Chandra's body? That would explain the entry on the computer (which practically said where x marked the spot), the missing jewelry (theft), and the keys (to get into the apt to leave the clue). The body would conveniently have clues (fibers, hair, etc) that would conveniently lead the investigation
away from the person responsible (not necessarily the person doing the killing). But all this would be predicated on the Keystone Kops actually finding the body, which shouldn't have been too darn difficult with that handy computer clue and the use of cadaver dogs. Now that so much time has passed the conveniently placed exculpatory evidence may be gone. Or too much might now be known about other suspects to make it instantly useful in blaming a random perp.
Or maybe my tinfoil's too tight. Just a theory.