Things learned from Cobra! (Spoilers)
1. If an eye-witness sees you commit a crime, it's better to disappear for a while, then to try and murder the eye-witness, which will cause you to commit more crimes, carnage etc by doing so.
2. If the police department's trying to protect the sole eye-witness by leaving town, and there's a good chance "someone's on the inside", it's best to take "extra cops", when one might be a "rat", and the "extra cops" are hugely ineffective in combat compared to the one super-cop "Cobra".
3. A "female cop", who works for the cultists, thinks it's wise to rat out the eye-witness's location, right in full-view of Cobra, to arouse his suspicions.