Dallas police are looking for a man who randomly attacked a bystander and an employee of the City Tavern of Elm Street in an incident that occurred just before 2am last Saturday.
Surveillance footage captured the suspect winding back and swinging a 5-foot-long tree branch, knocking down Adam Mercado, before punching the employee and walking away from the scene.
According to NBC DFW, Mercado was diagnosed with a concussion.
Authorities say they have yet to identify the suspect, and that the investigation into the case is ongoing.
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