peter selis.catherine heenan shows us what may have motivated the shooting. "selis does live in the complex and he entered the complex and lay on a lounge chair."itnessed shooting> "he was very docile, in his facial expression there was no smiling, laughing, talking for that matter. he did kind of, i'm not gonna say stare at our party but he looked over at our party multiple times." "no one knew him but one of my friends who actually got hit multiple times saw him sitting there so he went over there and offered him food, drink, whatever. said hey. introduced himself. said this is my party, you're welcome to hang out. can i get you something." natthat is when the shooter opened fire, striking the host and one other person,neighbors used their phones to record the scene as police responded. "rp heard five or six gunshots and now people are screaming ... more nat "suspect is reloading his gun in the pool area. ... he's sitting in a lawn chair, telling people to leave."police say selis was despondent over a breakup with his girlfriend a few days earlier... and called her after he began his