Authorities say a deputy who fatally shot a hospital patient wielding a metal sign post also was involved in the death of an inmate last year shot with a stun gun.

Police on Thursday identified Patrick McPartlin, an 18-year veteran of the Fairfax County Sheriff's Office, as the deputy who shot and killed Jovany Martinez outside Inova Fairfax Hospital last month.

McPartlin is on administrative leave while the shooting is investigated. Police say Martinez was having a mental episode and had injured one person before he charged McPartlin with the post.

McPartlin was part of a team that restrained Natasha McKenna last year as she was removed from a jail cell. Authorities say McKenna, who also suffered from mental illness, died after receiving four Taser shots during a 15-minute struggle.