(Beaverton, OR) -- Beaverton Police have arrested a suspect in a workplace-related shooting that happened in April. 37-year-old David Oliver allegedly followed a coworker from their place of employment in Portland following an argument. Oliver shot a single round from a handgun into the driver's side door of the coworker's vehicle. The person wasn't hurt. Tactical teams served search warrants in Gresham and North Portland on Friday and Oliver was arrested.