A Vietnam veteran from Nevada will serve nearly six months in jail after pleading no contest to stealing $600 from a man who had just been killed in a two-vehicle crash in southwest Kansas.

The Dodge City Globe reports David Bilbrey’s attorney told a Ford County judge her client suffers from severe post-traumatic stress syndrome.

Prosecutors say James Cox of Plains was carrying a large amount of money when he was killed in a crash Sept. 11 on U.S. 54 near Bucklin. Bilbrey’s attorney, Deanna Knapp, says her client drove up to the scene, checked Cox’s pulse and then picked the money up off the road and drove away.

Knapp says the crash triggered a flashback to the violence Bilbrey had seen in Vietnam and he shut down.