The Travis County district attorney’s office said last week it closed the case on allegations of political influence on investment decisions by the Teacher Retirement System of Texas earlier this year after an investigation found no criminal violations.

First assistant district attorney John Neal said the office last year received a copy of a memorandum from TRS investment director Michael Green alleging that the retirement system’s chief ­investment officer had overridden ­objections from staff in making questionable investments in a company owned by board members appointed by Gov. Rick Perry.

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