Hi Gull, I had this same issue! According to the developer, the "officer down" callout was never working properly and he advised to ignore it (not even reject it, just ignore it). The shots fired callout is also not working properly. I also had crashes on standard callouts such as disturbance by homeless people, etc. I got rid of callouts+ and viola, the standard callouts worked! I miss the othe rperks of callouts+ (like the "revive PED" feature), but when it came to frequent crashes vs. functionality, I chose to eliminate callouts+ altogether. It's probably not the answer your looking for, but it's what worked for me.