(Video provided by Baltimore Police Department)
When the gunman in the surgical mask, sunglasses and latex gloves bursts into the Northeast Baltimore barber shop, nobody seems to flinch.
Even when his gun jams when he points it at his unsuspecting victim, the gunman calmly takes time to fix it and carry out the execution.
The chilling video capturing the moments before the murder of David Porter, 41, was released by Baltimore Police Department as they seek help solving the case, though the gunman's disguise all but ensures no one will identify him from the tape.
But the video puts on full display the brazen and callous nature of the city's violence.
Porter was the son of a Baltimore Police dispatcher, Alva Porter. She's worked for the department for more than 20 years.