thought she might be drink and driving. so he installed an app on his phone that allowed him to track her phone and followed her because he was worried, then he saw her car parked near gavins and thought it best to talk to them. he didn't sneak up on them, he said. >> so i knock on the hood of the car. >> was chandy sitting on the lap of this guy? >> sitting on his lap, they just kept talking. i walked over to the passenger's side door, knocked on the window. >> what did they do? >> chandy opened the door. >> what did she say to you? >> what the [ bleep ] are you doing here? >> he started to argue. then gavin leans in. >> i'm leaning down to tell him to mind his own business. that's when he leaned up and punched me, pulled me in by my sweater, put his hand on my throat. choking me by the throat. >> it was gavin who threw the first punch, he said, of course he fought back.