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HOUSTON, Texas (KTRK) -- A former Houston police officer was among the more than 250 people arrested in the Houston area as part of a nationwide prostitution sting this summer.According to court records, Darrin Dewayne Thomas has been charged with prostitution, a misdemeanor offense. He is currently out on $500 bond.In 2011, Thomas surrendered his peace officer's license for life after allegedly stealing more than $500 in cash during the course of his duties as an HPD officer.At the time he was relieved of duty, Thomas was working as a senior police officer in the North Patrol Division. He had been with the department since 1994.Thomas is expected in court at the end of August.