Chainalysis materials (Cook County Sheriff)

Dear Tonya Riley:
Thank you for your interest in public records of the Cook County Sheriff's Office. Your request was received in this office on 1/4/2023 and given the reference number R035675-010423 for tracking purposes.
Your request will be forwarded to the relevant department(s) to locate the information you seek and to determine the volume and any costs associated with satisfying your request. You will be contacted about the availability and/or provided with copies of the records in question.
To monitor the progress or update this request please log into the FOIA Request Center

--- Please respond above this line ---
RE: FOIA Request of January 04, 2023, Reference # R035675-010423 Dear Tonya Riley, Thank you for contacting the Cook County Sheriff's Office ("CCSO") pursuant to the Illinois Freedom of Information Act ("FOIA"), 5 ILCS 140/1 et seq. (2012). Your request mentioned: To Whom It May Concern:

Pursuant to the Illinois Freedom of Information Act., I hereby request the following records:

Documentation on the usage of Chainalysis and/or Chainalysis' Reactor software in criminal investigations including:
- Memorandum(s) of Understanding
- Initial Bid Documents
- Requests for Proposals
- Any privacy impact assessments
- Any instructional materials or presentations
- Letters of Interest
- Usage policies
- Any informal agreements that reference Chainalysis or otherwise guide the use or the relationship between this agency and the software.

I am interested in any records from 1/2/20 to the time of the search.

I ask that any fees be waived as I am a journalist with CyberScoop.com, a national award-winning publication that is also recognized by the Senate Periodical Press. These documents will be made available to the public and are being requested for reporting not commercial purposes.

The requested documents will be made available to the general public, and this request is not being made for commercial purposes.

In the event that there are fees, I would be grateful if you would inform me of the total charges in advance of fulfilling my request. I would prefer the request filled electronically, by e-mail attachment if available or CD-ROM if not.

Thank you in advance for your anticipated cooperation in this matter. I look forward to receiving your response to this request within 5 business days, as the statute requires.

Sincerely,

Tonya Riley

Upload documents directly: https://www.muckrock.com/ Please be advised that the CCSO conducted a diligent search based on the information you provided. However, no records were found in response to your request. Please contact us by replying to this email if you have any further concerns/questions related to this request. Sincerely, Sarah Smith
Assistant General Counsel - FOIA Officer Cook County Sheriff's Office FOIA Officer/Legal Department