Baltimore city police spokesman TJ Smith shared the tragic loss of his brother to gun violence on his Facebook page Tuesday night.

Smith's brother Dionay was shot Sunday in his apartment. He learned about his brother's death while he was on the job.

Dionay Smith, 24, was fatally shot around 8 p.m. Sunday, found in a home on the 1400 block of Argyle Avenue. Baltimore Police are hoping the public can help identify his killer. They released surveillance video on YouTube Wednesday.

Smith took to Facebook to express what he's going through and how his experience as a public information officer was affected:

On Sunday evening, one of the names that came to me was way too familiar. Dionay Smith. My brother, known as Dion, is the only person I've ever known with the name Dionay. Like many families who have been in that position, I was in denial. I immediately contacted investigators to learn more about the Dionay who was found deceased from a gunshot wound. I also did what is instinctual; I called his cell phone several times. Of course, there was no answer. However, I remained in denial.

He also wrote:

To many, he will be #173, but to me and my family, he's Dion, a brother, a son, a father, a friend, a nephew, and a kind soul.