along with the above comment, for shots fired the different incidents could have different weapons involved, I feel like especially in the more rural parts of the map that a shooter would choose a more long barreled gun over a pistol.
And for suspicious persons, It would be cool if you could implement that one script from Hoppah's U.S. Army mod, where you had to send a unit to a specific location and once the unit got there you would have to wait a few seconds and then one of a few things would occur. Also, It would be interesting if depending on how you handle the incident it could even turn into a shots fired call.