Once a uniformed deputy takes a report, C.I.D. will begin a follow-up investigation. C.I.D. is responsible for processing and cataloging evidence at crime scenes. They also prepare affidavits for arrest warrants, search warrants, interview victims, witnesses, and suspects, and perform many other related duties.
Criminal Investigators assist patrol deputies in the investigation of fatality traffic accidents on county roads. For example, in February 2006, they investigated a fatal crash involving alcohol that resulted in charges of Negligent Homicide being filed against the driver. It was possible to bring charges several months after the crash due to the efforts of investigators in collecting and submitting DNA and other evidence from the crash site to the Arkansas State Crime Laboratory for analysis.