The signs? Well I'm assuming it was pretty clear when the police found him -- not that it was that hard. He was passed out in his truck. Which was parked at... you guessed it, the police station. If that wasn't bad enough, he had a bag full of vomit between his legs. Earlier in the evening he was allegedly seen carrying an unconscious female on campus, who was also charged with 'Minor in Possession'.
That is some pretty clear signs that he was pretty fucked up.
He was considered a front runner for the WSU job, but is out for spring practice due to a knee injury that he got last year after throwing 4 touchdowns in 5 appearances. Obviously, he has been rehabbing very hard, but now he is suspended by WSU. The official charge is 'Minor in Possession'.