Ankle and wrist monitors Radio frequency (RF) ankle monitors are often used for curfew compliance with juveniles or individuals considered low risk for criminal behavior. In addition to wearing an ankle monitor, the individual sets up a separate monitoring unit at home. The unit can be programmed to detect an ankle or wrist monitor within a short range of 50 to 150 feet in order to send a message to a staffed monitoring station. The supervising officer can establish a person's schedule, requiring the individual to follow a daily routine, and ensuring that alerts are sent when the individual veers from the schedule or tampers with the ankle monitor. Higher risk offenders, such as sex offenders and domestic abusers, are more likely to wear a water and impact-resistant electronic monitoring (EM) device using
Global Positioning System (GPS) for minute by minute tracking purposes. The ankle device runs on batteries to be charged once or twice a day and utilizes commercial cellular networks to transmit data points and location information anywhere in the world. Probation officers can program and map
exclusion zones, where individuals are prohibited from entering, lest they set off an alert to their probation officer and risk a technical violation of their probation. Exclusion zones for sex offenders may include day care centers or schools. Supervising officers can also program buffer zones within a certain radius of a prohibited area, so an alarm will sound if the monitored individual approaches an exclusion zone. Some ankle monitors are equipped to call and record people without warning. Others have microphones and speakers to record conversations that could be used in criminal cases, depending on state law. While active GPS tracking allows for triangulation in transmittal of information, passive GPS tracking stores data that can be downloaded for a future time. According to a study conducted by the East Bay Community Law Center of juveniles subjected to electronic monitoring in 58 California counties, any deviation from a daily schedule of school and work required the electronically monitored juvenile to seek permission from a supervising officer 24 hours to a week in advance of the schedule change. For adults under
house arrest or other geographical restrictions, they may be prohibited from going grocery shopping, attending a child's school event, going to a beauty salon or washing clothes at a laundromat. African Americans are more likely than whites to choose prison over electronic monitoring, though reasons for the preference are unclear. Probation officers report African Americans view electronic monitoring as more restrictive than white people perceive it. Should an individual try to remove or succeed in removing an electronic device, consequences could include jail, prison time, fines or a tightening of the ankle monitor. A male going only by the name of Christopher told
the Marshall Project, a non-profit news service focused on criminal justice, that he had to wear an ankle monitor from the time he was 13, until he was 18, after having committed violations of his probation. In describing the monitor, Christopher said:
Smartphones with biometric security systems Proponents of using
smartphones to track and constrain an individual through
fingerprints,
facial recognition and voice verification tout the cell phone's capability to integrate several features: Internet access; touchscreen interface; camera and video recording; location mapping and other applications. The tracking applications known as Smart-LINK and Shadowtrack may be installed on the individual's personal cellphone, referred to as a
Bring Your Own Device (BYOD), or integrated into a cell phone law enforcement buys or leases from a vendor and then assigns to an individual upon their release into the community. The American Probation and Parole Association (APPA) supports the use of smart phones for surveillance because the organization believes the cell phone, with its calendar feature, cuts down on technical violations in which an offender misses an appointment with a probation officer.
Automobile ignition interlock device The
California Department of Motor Vehicles describes an automobile ignition interlock device (IID) as a device the size of a cell phone that is wired to your car or truck's' ignition to require an individual to offer a breath sample before the engine will start. If the sample is not satisfactory or indicates alcohol consumption, the engine will not ignite. Periodic breath samples are required during a driver's route to ensure the driver is not stopping to drink along the way.
SCRAM Secure Continuous Remote Alcohol Monitoring (SCRAM) in the form of a wrist band or hand-held device may be used to sample a client's breath and perspiration every 30 minutes to report blood alcohol level to a supervising officer. One SCRAM vendor advertises a "wireless, portable breath alcohol device with automated facial recognition and GPS with every single test."
Automated Parole or probation check-in platforms In the early 1990s, New York City piloted 16 automated probation check-in machines, also known as probation kiosks, with each $750,000 kiosk featuring a video screen, keypad and infrared scanner for low-risk offenders to answer questions as to whether they had been re-arrested, obtained a job or needed counseling. By 2004, after a budget-strained NYC deemed the kiosk program a success, reducing costs while freeing probation officers to meet personally with priority high-risk offenders, the automated check-in centers were instituted for 30,000 offenders. By 2015, 70% of the city's probation population was expected to use the automated kiosks.
ION Wearable ION Wearable was launched in 2021, and features a discreet wearable that can measure transdermal alcohol continuously, paired with a smartphone app to view data and send automatically generated reports. The sensor is based on patented and peer-reviewed enzymatic cartridge technology. Readings report alcohol consumption as 'clear' or 'signal detected', and the built-in skin proximity sensors can measure that the wearable is being worn continuously with an 'insufficient skin contact' if the wearable is removed. ION Wearable is being marketed to individuals wishing to rebuild trust after a DUI, custody case, or wanting to rebuild trust through connected support and accountability in the app. == Costs and Benefits ==