Overview

• Evens Laforet, 24, of Rochester, N.Y., pleaded not guilty in Chelsea District Court and is awaiting a dangerousness hearing on Thursday.
• Prosecutors allege he threatened to kill a coworker, chased him with two machetes, and stood over him before other employees intervened.
• Police say he fled toward a nearby marsh as Revere officers, State Police K9, and the Air Wing set a perimeter and negotiated his surrender.
• Authorities have not released the victim’s identity or explained what motivated the dispute.
• DA Kevin Hayden’s office reports Laforet had shown aggressive behavior during his month at the facility and the clash began over a workstation assignment.