Kill within time frame & helo

[Ice_Rhino 3]

I want to add an element to my mission. If a team I engage is not dead with around 10 seconds, I want a helo to take off, searchlight on and fly a pattern over an area. Then if the helicopter finds me, say out in the open, I want it to draw troops into my locale. I can link the helo to a trigger and waypoint path OK. My question is two fold;

1. How do I place a timer on any engaged soldier, I guess Blue detected, that will trigger if they are not dead within 10 seconds, and

2. Make it so the helo has to look for me rather than just 'there they are' and then call troops in if detected

Thanks

Toni

aka Ice Rhino