How to request assistance


Examination requests are accepted by appointment only.


Please contact the DFI Unit to discuss your request and schedule an appointment for submission. Prior approval from the assigned prosecutor and DFI Unit will be required before submissions will be accepted.  

A copy of the legal authority for examination will be required at the time of submission. Submission will not be accepted without this authorization.

When you arrive, you will be asked to fill out a Submission Request Form. This form can be filled out ahead of time by visiting our Documents and Forms page here. Please be as detailed as possible so that we can better assist you during the examination. If your case needs to be expedited, please let us know at the time of submission.

If your evidence will require additional testing such as DNA or fingerprint processing, please have this testing done prior to submitting it to our unit. 

If your evidence contains blood or other biohazard material, please have your evidence clearly marked and let us know at the time of submission. 

During the submission process, you will be provided a DFI Control number. Please keep this for your reference, as this is the best way to look up the status of your case.

Case intake hours are from 8a – 4p. If there are special circumstances in which assistance is needed outside of these hours, please contact us ahead of time to discuss.

Examinations are prioritized on pending court dates and the nature of the offense being investigated.

If you have any questions please feel free to contact us at 713-274-5920.

You can also email us at