The bill amends Massachusetts General Laws, specifically Chapter 126, Section 40, to enhance the reporting requirements for jails and houses of correction, particularly in Middlesex County. It introduces a new section titled "Overview of Quarterly Population Report for the Individual Massachusetts Sheriffs' Offices," which mandates sheriffs to record detailed data for each inmate, including identifiers such as probation central file number, state identification number, race and ethnicity, as well as admission and release details. The bill requires the compilation of this data into a quarterly report submitted to key legislative and public safety officials, ensuring that no identifying information about individual inmates is disclosed. Additionally, it includes new definitions for critical data points and notes the limitations of the Sheriffs' Offices in reporting certain data, such as case disposition and bail information, which are managed by the Trial Court.

Furthermore, the bill emphasizes the importance of maintaining accurate records of inmate demographics, including race and ethnicity, to promote transparency and accountability within the correctional system. It outlines specific requirements for documenting admissions and releases, including the length of stay and earned time credits, and mandates the collection of data on inmate participation in rehabilitation programs. The proposed changes aim to improve the overall efficiency of the correctional system, address disparities in treatment based on race and ethnicity, and support the successful reintegration of inmates into society. Overall, the bill reflects a commitment to reforming the justice system by ensuring comprehensive and sensitive data collection and reporting practices.