The officer who shot and killed Sylville Smith Saturday afternoon, now identified by the Journal Sentinel as MPD Officer Dominique Heaggan-Brown, also moonlighted as an amateur rapper. 

A June 2015 YouTube video for the song "Monster Freestyle," performed by Milwaukee rapper Dae Flywalker and "KB Domo" – Heaggan-Brown's rap name – has begun making the rounds on social media, as well as finding its way into national coverage of the Milwaukee riots and unrest.

At one point during his verse on the Meek Mill freestyle, Heaggan-Brown, wearing a Milwaukee Home shirt and a floppy Brewers hat, raps that, "Imma start a riot like Baltimore."

Later in the video, he says, "I'm all about the dollar and some came in the mail today." During the beginning of his verse, Flywalker also points his finger at the camera and makes a shooting motion.

According to a source with knowledge of the video, Heaggan-Brown was allegedly under MPD investigation for the video at the time of the shooting. "There was a current internal file on him when this happened," the source told OnMilwaukee. "The cops know about it."

OnMilwaukee contacted MPD to confirm if the officer was being investigated. Sgt. Tim Gauerke of the Milwaukee Police Department's Office of Public Relations said, "I'm sure (MPD) has seen it. They will see if any department regulations were violated. If there are violations then Internal Affairs will investigate."

According to an interview with Dae Flywalker on the Milwaukee music website Breaking and Entering, the Milwaukee emcee has known Heaggan-Brown since grade school; in fact, he was the one who actually convinced Flywalker to start rapping. Flywalker also tells the site that he hasn't talked to Heaggan-Brown since the weekend's events, but he "was in shock and disbelief just like everyone else that knew him or grew up with him."

He goes on to tell Breaking and Entering:

"I just want people to disassociate me with the actions that took place that tragic day. I don’t condone the death of anyone, especially someone that looks like me and comes from the same background. I was not there and I have only received the same information as the rest of the concerned community. Emotions are high in our city and through positive energy and prayer, I hope that we can find a time of healing for the city and justice for those affected."