Federal prosecutors investigating the scandal-plagued Probation Department are focusing on Democratic legislators who may have benefited from the agency’s allegedly rigged hiring system, including House Speaker Robert A. DeLeo. Prosecutors have subpoenaed several lawmakers to testify before the secret grand jury, including the lawmaker that DeLeo defeated to become speaker in 2009. Representative John Rogers’ backers suspect former Probation Commissioner John J.O’Brien helped DeLeo win by giving jobs to people close to legislators backing DeLeo, a charge both men deny.
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