Evan Smith unties Suh's shoes?

 In an interview with KXTG in Portland, here is what former Packers offensive lineman Matt Brock suggested might have triggered Ndamukong Suh to go after Salinas High product Evan Dietrich-Smith and stomp him on Thanksgiving.
  Here's a transcript of Brock's interview, courtesy of MLive.com.
 The center, or one of his guards, he's had like one or two starts in his career and he's got to play against Suh. So he's pretty puckered, right? So, he's talking to James, the offensive line coach, going, "What do I do? What do I do?"
James is just in his mind going, "This guy is going to get killed. I got to take his mind off it, give him something else to do." So he says, "Ok, every time you're in a pile, I want you to focus on something. I want you to untie his shoes."
He goes, "What?"
"Anytime you can, just reach in, he's got floppy shoe laces, he doesn't spat or anything, just untie his shoes. It will irritate him."
He untied his shoes three times in the game. That's why he stomped him. That's why he banged his head on the ground and he stomped him. When (Suh) went to the sideline it looked like he was telling the coach, "I didn't do anything" and he put his foot up like, "I didn't stomp him. I didn't do anything." He was actually going, "The damn guy keeps untying my shoes."
 But did Suh stomp on the right player?