103 CMR, § 155.07
A detainee record shall be maintained on every detainee. Initial construction of the detainee record shall be performed by Records staff at the institution that receives the detainee. The detainee record shall be a manila folder containing relevant material related to the detainee's confinement within the Department of Correction. The folder shall accompany the detainee upon a transfer from one institution to another within the Department of Correction.
Upon release of the detainee, the detainee record shall be maintained at the Department of Correction institution where the detainee was located. Records of released detainees shall be maintained by year of release and by alphabetical order and shall be stored in accordance with the Massachusetts State-wide Record Retention Schedule.
103 CMR, § 155.07