A grand jury has determined a U-Haul employee was justified in fatally shooting a would-be robber earlier this month in Southeast Portland, police say.

Tyson B. Pfau, 27, won't be prosecuted in the shooting death of 53-year-old Robert R. Porter, who police say tried to rob the Powell Boulevard U-Haul office at gunpoint on Jan. 3.

Detectives learned Porter went into the business and demanded money while wielding a handgun, Portland police said in a news release. Pfau shot him multiple times during the incident, police said, and another employee called 911.

Police said witnesses and Pfau, a concealed handgun license holder, cooperated with investigators. Police released no additional details about the circumstances of the shooting.

Detectives think Porter, a Newberg resident, had been involved in multiple other Portland-area robberies. Police said he was taken to a hospital but died.

Police urge anyone who has information about the investigation to contact Detective Todd Gradwahl at 503-823-0991 or Todd.Gradwahl@portlandoregon.gov.

— The Oregonian/OregonLive