NORTH MANKATO, Minn. (AP) — An investigation has concluded that North Mankato police officers were justified in using stun guns on a man who later died.

Officers on Feb. 6 responded to a report of a man who had taken multiple prescription medications and was acting aggressively. Authorities say officers used stun guns to subdue 39-year-old Aaron Rasmussen when he ignored commands and advanced toward them.

Rasmussen died several days later. An autopsy listed the cause of death as complications from an irregular heartbeat.