If he were asked to put in a good word he probably would, but no, he may or may not offer to assist in this case depending on the circumstances. If he does he may offer that in his pious and professional opinion it would seem that the person is sincere and is in fact telling the truth. References are common for other situations as well, such as for employment,etc.
[Appropriate time to use that instrument of justice eagerly used against a probable offender, the lie detector. Bet if you suggest it it will probably be refused.
But the gesture would speak volumes in your behalf nonetheless. Caveat: To eliminate conflict of interest, ensure another police force does the test.]
AndyF