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Boone County Jail

The Boone County Adult Detention facility underwent a jail expansion in early 2003, increasing its capacity from 48 beds to accommodate up to 150 detainees. The facility follows a specific detainee management approach known as Direct Supervision, which involves close staff supervision of detainees in the day room of a housing unit. This setup allows staff to have direct and unobstructed contact with the detainees. In this system, a designated staff member is assigned to the unit and acts as a supervisor, similar to a police officer patrolling a beat. The officer in the housing unit takes charge of coordinating all unit activities and serves as a role model for detainees, reinforcing positive behavior. In Direct Supervision jails, detainees are rewarded for good behavior with privileges such as access to classes, games, television, and designated day room time. Conversely, negative behavior is met with consequences, aiming to discourage rule violations. Consequences for detainees who fail to comply with facility rules can range from short periods of lockdown in their cells to restricted access to unit activities or even transfer to a more restrictive unit.


Instructions for Posting Bail

To post a bond remotely, you can have your family or friends visit the website or call 1-888-604-7888 or 1-877-392-2455. Please note that a 7% fee applies to this transaction. Alternatively, you have the option to post bond in person at our facility using cash or a credit card.


If you prefer to make payment by cashier’s check, please follow these instructions:


For the Bond and Warrant fee, make the check payable to Boone County Circuit Clerk.

For the Bond Fee, make the check payable to Boone County Sheriff.


Deposit Money into Detainee Funds

The Boone County Jail offers a commissary system to provide detainees with approved items not supplied by the jail. Funds can be added to a detainee’s account using the following methods:

1. Cobra Lobby Cashier: Cash deposits can be made at the Cobra Lobby Cashier located in the lobby of the Boone County Jail. Please note that applicable fees will be charged.

2. Telephone or Internet: Deposits to detainee accounts can be made through Access Corrections by calling 1-866-345-1884 or visiting www.accesscorrections.com. Accepted forms of payment include credit cards, debit cards, and checks. When making a deposit, you will need the detainee’s name and their CID number.

For any questions or issues regarding the Cobra Lobby Cashier, please contact Swanson’s at 1-608-221-7651.


All mail intended for detainees should be directed to the specified address:


(Inmate’s full name)

Boone County Jail

615 North Main Street

Belvidere, Illinois 61008


Important guidelines to consider when sending letters to incarcerated individuals:


1. Upon arrival at the Boone County Adult Detention Facility, all incoming mail will be opened and inspected for prohibited items.

2. It is illegal to send contraband to detainees.

3. Only the United States Postal Service is accepted for mail delivery. Dropping off letters or envelopes at the reception desk is not permitted.

4. Envelopes must not exceed the size of 8.5 by 11 inches, and oversized greeting cards are not allowed.

5. Stickers, labels, tape, or glued items should not be attached to the envelopes or their contents.

6. Envelopes should not contain glitter, confetti, locks of hair, or any foreign substances.

7. Avoid spraying perfume or cologne on the envelope, as well as making lipstick impressions on the envelope or its contents.

8. Laminated items, hard plastic cards, new envelopes, blank paper, and postage stamps should not be included.

9. Cash should not be sent, but a Cashier’s check can be included, made out to (B.C.A.D.F. Detainee’s name). Money orders are not accepted.

10. Photographs (sized 5×7 or smaller) can be sent, provided they do not depict nudity, guns, gang signs or affiliation, drugs, or criminal acts. Polaroid photos are not permitted.


Magazines, newspapers, and article clippings should not be included in the mail.


Please ensure adherence to these guidelines when corresponding with detainees.


Securus Phone System: Inmate Communication

Detainee calls can be efficiently blocked by contacting a dedicated Customer Service Representative. To initiate the blocking process or obtain further details, individuals can reach out to the provided helpline at 1-800-844-6591. Additionally, comprehensive information can be found on the Securus website for those seeking additional guidance and assistance.


Securus Video Visitation: Virtual Meetings

To ensure safety and security, face-to-face or contact visits are not permitted at the Boone County Adult Detention Facility. However, the facility provides Video Visitation as an alternative means of communication. During these visits, no personal property can be picked up or dropped off, except for prescription medication, which can be submitted at any time.


Here are the guidelines for visitors:


1. Visitor Approval: Prior approval is required for all visitors before they can schedule a visit. The registration process is outlined below.

2. Registration: Visitors can register for both remote and on-site visits by visiting Securustech.net/videovisitation. Remote visits may have associated fees.

3. Advance Registration: All visitors, whether for on-site or remote visits, must register at least 24 hours in advance to be allowed to visit.

4. Visitor Presence: The person registering for the visit, whether remote or on-site, must be present during the scheduled visit.

5. On-Site Visits: The facility offers on-site visits on Sundays and Wednesdays. Detainees are allowed up to two fifteen-minute visits per week, which can be scheduled for the same day. Each visit can include up to two registered adult visitors. The visiting week starts on Sundays.

6. Visitor Age Requirement: All visitors must be at least eighteen (18) years old unless accompanied by a parent or guardian. The parent/guardian must stay in the visiting booth or be physically present during a remote visit.

7. Pre-Visit Preparation: Remote visitors should log in 10 minutes before their scheduled visit. On-site visitors must provide a photo ID.

8. Personal Belongings: Visitors are required to leave all personal belongings, except car keys, in their vehicles or secure them in lobby lockers. This includes cell phones, hats, bags, purses, coats, recording devices, and similar items. Failure to comply may result in the removal of items or termination of the visit.

9. Monitoring and Recording: All visits are monitored and recorded. Visitation privileges can be restricted or revoked if visitors or detainees violate visitation or facility rules.

10. Termination of Visits: Visits will be immediately terminated in case of nudity, inappropriate conduct, three-way calling, violation of statutes/laws, illicit drug usage, gang activity, or any other prohibited behavior. This list is not exhaustive.

11. Support and Contact: For any problems or questions related to remote visiting, visitors can contact SECURUS at 1-800-844-6591.


These guidelines ensure a smooth and secure visiting experience for both detainees and visitors at the Boone County Adult Detention Facility.


Schedule for Visiting Detainees

Remote visits offer flexible scheduling options throughout the day once visitors have received approval. Once approved, visitors can log on to the system and schedule a visit, where available time slots will be provided for selection. Please note that fees for remote visits are determined by Securus and may be subject to change without prior notification. For more information on fees or refund inquiries, visitors can refer to the Securus website.


Additionally, the facility allows for on-site visits on Wednesdays from 7:00 pm to 9:30 pm and Sundays from 9:00 am to 1:00 pm. These on-site visits have a duration of 15 minutes and are free of charge.


Boone County Sheriff Department

Sheriff Scott Yunk serves as the chief law enforcement officer in Boone County, holding the position responsible for overseeing the operations of the county’s largest law enforcement agency. The primary objective of the department is to safeguard the lives and properties of the county’s residents. As the Sheriff, Sheriff Yunk is entrusted with the duty to uphold federal and state laws, as well as local county ordinances, within the unincorporated areas of the county.


While the Sheriff has the authority to enforce laws throughout the entire county, it is customary for him to respect the jurisdictions of individual municipalities, villages, or towns that have their own law enforcement agencies. However, the Sheriff may assist these communities upon request from federal or state authorities, or the respective local authorities. The Sheriff’s position is an elected office, with a term of four years.


The Boone County Sheriff’s Office is located in the Public Safety Building in Belvidere, which it shares with the Belvidere Police Department. This arrangement allows both departments to operate independently while fostering inter-governmental and inter-departmental collaboration and support, which has proven beneficial in terms of cost savings and swift response capabilities. This cooperative effort serves as a significant advantage to the taxpayers of Belvidere and Boone County.


Overview of Boone County

Boone County, located in Illinois, was established on March 3, 1836, as a separate county from Winnebago County. It was named in honor of the renowned Kentucky pioneer, Daniel Boone. However, the county’s present boundaries were not established until May 4, 1843, when a one-mile-wide strip was annexed from Winnebago County, extending the western border.


Boone County is situated north of Wisconsin, sharing borders with Rock and Walworth Counties. To the south, it is bordered by DeKalb County, while McHenry County lies to the east, and Winnebago County to the west. In 1850, the county consisted of eight townships: Belvidere, Benton (formerly known as Fairfield and then Flora), Boone, Bonus, Caledonia, Leroy (previously Beaver), Manchester, and Ohio (later renamed Spring). Eventually, Poplar Grove township was formed from parts of Boone and Caledonia townships.


With an area of only 290 square miles, Boone County is the smallest among the counties in the “northern tier” of Illinois. Its landscape was predominantly rolling prairie before the introduction of agriculture. The earliest settlers in the county hailed from New York and New England. The county seat, Belvidere, was established and laid out in 1837.


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