ed laftch dare are r ed latch d a is in houston with more. >> reporter: we're waiting to see the latest update. team executive said he had gone through a series of tests and evaluation and it all started with gary kubiac feeling dizzy and lightheaded. you can see texans head coach gary kubiac on the 24 yard line when he suddenly falls to his knees during sunday night's game. long time colleagues rushed to his side. the teams were walking off the field for halftime during the game between the texans and colts when the 52-year-old coach fell ill. this was the scene in houston as he was rushed off the field on a gurney. concerned nfl fans watching from the stands. >> he went down to his knee and couldn't get back up, looked like he was having trouble breathing. >> reporter: the ambulance rushed kubiac to a hospital with his family by his side. >> all his vital signs are good. he did not have a heart attack. but they're still checking on everything where him.

all that i'm saying is if it was a brown dude with an anti-government ideology, our american entire society would be calling it an act of terrorism which it is. and i think that paul ciancia should be called terrorist. >> we were interested in how the fb ichli defines terrorism. it involves acts dangerous to human life. appears to intimidate or coerce civilian population. and occur primarily within the territorial jurisdiction of the united states. and all of these things certainly seem to fit what paul ciancia is accused of. but isn't there a difference between someone having mental illness and using something as an excuse, you know, as opposed to someone who like goes to another country, is trained by terrorists overseas and then comes back into the united states to commit an act of terrorism? >> it's important to keep in mind fbi and law enforce him me