denver broncos cornerback aqib and his brother are being investigated for aggravated assault .
talib was in trouble before and was wanted on charges of aggravated assault with a deadly weapon in 2011 .
during a 2011 incident involving two guns when he playing for the tampa bay buccaneers , talib and his mother were accused of shooting a gun at a dallas-area nightclub on wednesday morning .
during the latest incident , a shot was fired outside of club luxx in dallas , texas .