Law schools expect applicants to exhibit "good moral character," according to the University of Massachusetts at Amherst. If you have been convicted for a criminal act in the past, take full responsibility for it. Engaging in activities that show that you are of good character and have changed your ways may prove useful to getting into law school.
Find out what exactly your desired law schools consider a relevant criminal record. Some law schools only consider offenses for which you were convicted; others require the explanation of any disciplinary actions by police (such as an arrest, even without a conviction). Some law schools will also require you to submit all available documentation relating to your case . You are not required to disclose information on your youth criminal history.
Explain the circumstances of your offense and conviction in your application. Do not alter facts or withhold crucial information as this could be grounds for rejection. According to the UMass pre-law guide, you should not blame your arrest on police targeting you or on the incompetence of your lawyer.