LOS ANGELES (CBSLA.com) — A $10,000 reward was offered Tuesday for information leading to the arrest of two women accused of fatally beating a 65-year-old man at a Blue Line train stop.

John Wayne Whitmore was beaten on June 13 while waiting for a train in the 10000 block of Willowbrook Avenue, between Imperial Highway and Wilmington Avenue in Commerce, according to the Los Angeles County Sheriff’s Department.

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Whitmore was waiting for a Metro train after he went shopping for his medication when two women approached him and beat him severely after a brief argument, officials said.

“It doesn’t make any sense for somebody to beat up an elderly person that cannot defend themselves,”  the victim’s sister Genevieve Whitmore-Aldrich said.

Whitmore was transported to St. Francis Hospital with blunt force trauma to the head where he later succumbed to his injury, according to Officer Nicole Nishida.

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Police released security footage Tuesday asking anyone who recognizes themselves in the video or may have witnessed the incident to come forward.

(credit: CBS)

(credit: CBS)

“I would beg anyone that saw it — don’t be afraid to come forward, because it could happen to anybody,”  Whitmore-Aldrich said. “It was a vicious crime, and it obviously took awhile. It wasn’t just a hit and a fall, so that’s why I plead for somebody to come forward because there were a lot of people that saw it.”

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Anyone with information should contact the LASD at (323)267-4800.