Electronic monitoring program

The Massachusetts Probation Service's electronic monitoring program (ELMO)

The Massachusetts Probation Service’s Electronic Monitoring Program was first established in April 2001 as an alternative to incarceration and to provide structure, control, and accountability of probationers who were sentenced to house arrest by a judge. The Program also provides an extra layer of supervision with the goal of enhancing public safety in the community.

The Probation Officer is responsible for the supervision of their assigned probationers who are placed on the Massachusetts Probation Service Electronic Monitoring Program.

There are two types of electronic bracelets: the Radio Frequency Bracelet, which is used as a form of house arrest, and the GPS Bracelet, used to track an offender’s whereabouts in real time.

How GPS monitoring bracelet works

The GPS consists of 24 satellites orbiting the earth. It determines the location of offenders wearing the receiver 24 hours a day, seven days a week.

If an offender enters an area where they have been restricted from, an alert will go off. A Probation employee will contact the offender on a specialized GPS cell to determine why they entered and to instruct them to leave.

How the radio frequency bracelet works

If an offender on the Radio Frequency bracelet leaves his or her home at a time not authorized by a judge, an alert (auditory or visual) indicates that the probationer is out of range. The ELMO Command Center then responds immediately. When an RF bracelet is tampered with (banged, removed or hit), a sensor indicates a violation and probation is alerted. If the Probationer has absconded, a warrant is issued for their arrest.

Electronic monitoring program operations

The Electronic Monitoring Program headquarters and daily operations are managed by the Programs Division of the Massachusetts Probation Service. The program’s central office is located in Clinton and is open 24 hours a day, seven days a week, 365 days a year. The Electronic Monitoring Program is staffed by a team of Probation employees. Probation Officers at various courts throughout the Commonwealth are responsible for hooking up the electronic bracelet on the probationer.

In the event an offender tampers with their bracelet or absconds, the monitoring center notifies the court and Chief Probation Officer. An arrest warrant is then issued for the offender. This warrant protocol is applicable for both systems. There are 479 offenders on the Radio Frequency bracelet and 2,391 offenders actively being tracked by GPS system for a combined total of 2,870 offenders statewide on a daily basis.

Monitoring center

Main Number: 978-365-2970
Toll-Free: 866-490-1166

Hours of Operation: 24 hours a day, 7 days a week, 365 days a year.