Robert Stamps, one of nine Kent State students wounded in the Ohio National Guard shootings that killed four other students 38 years ago, died in Tallahassee, Fla., of complications from pneumonia, his wife said.

Stamps, an observer who was sympathetic to anti-war demonstrators, was struck in the lower back on May 4, 1970 while fleeing tear gas and gunfire during a protest against the U.S. invasion of Cambodia. He rode in the same ambulance as Allison Krause and Jeffrey Miller, both of whom died from their wounds.

Stamps, 58, passed away Wednesday night, Teresa Sumrall said in an e-mail. He's the second of the nine wounded students to die. James Russell died last year at the age of 60, said Alan Canfora, another student who was wounded.