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University study urges Shelby County to invest in rapid DNA, digital forensics and shared ballistics capacity
Summary
A University of Memphis Public Safety Institute study recommended the county expand digital-forensics staffing and servers, buy rapid-DNA machines and pursue a countywide ballistics analyst at the TBI lab. Estimated first-year cost for the three priority areas: about $1.56 million; a full local lab would be much costlier and years away.
A county-funded study by the University of Memphis' Public Safety Institute urged Shelby County to invest in three near-term forensic priorities: more certified digital-forensics staff and secure server capacity, purchase and maintenance of rapid-DNA equipment for 24–48 hour screening, and countywide access to ballistics analysts via a state-lab partnership.
Bill Gibbons, executive director of the Public Safety Institute, said digital forensics is growing rapidly as phone and device dumps become routine in investigations, and that a shared multi-agency unit would reduce duplication and improve turnaround. The institute estimated hiring six additional certified digital-forensics staff would run about $510,000 annually (salary and fringe), plus roughly $250,000 in server and storage capital.
Dr. James McCutchen, lead researcher, described rapid-DNA as a tool that can produce preliminary results within 24–48 hours to support charging decisions: cartridges cost about $180 each; equipment ranges roughly $200,000 per unit; a midrange three-machine deployment could run $600,000 in capital with annual maintenance. McCutchen emphasized rapid DNA would not replace full TBI lab testing used for trials, but would give investigators a faster, usable screening result.
Ballistics was the third priority: the report recommended the county negotiate with the Tennessee Bureau of Investigation to expand the existing arrangement the City of Memphis has with TBI so analysts can operate on a countywide basis. The report estimated the county's share to stand up two TBI-funded positions at about $64,000 (20% contribution toward a $320,000 two-year TBI agreement).
Gibbons and McCutchen estimated the combined first-year investment for the three priorities at about $1.56 million; they noted some costs are one-time capital while others are recurring. The report also flagged evidence-storage and transport conditions that can degrade DNA and urged a task force to audit storage sites and vehicle capabilities.
Commissioners asked about timelines, staffing/retention and opportunities to obtain federal or state grants. Presenters said the county should also pursue grant funding but be prepared to fund recurring staffing and maintenance costs; a full local accredited forensic lab would likely cost tens of millions of dollars and take years to stand up.
Why it matters: Faster turnaround on forensic evidence is tied to clearing backlogs, strengthening prosecutions and reducing investigative timelines for serious crimes. The study provides a prioritized, costed blueprint commissioners can use when evaluating budget requests and grant-seeking.
Provenance: Public Safety Institute presentation to Law, Enforcement, Corrections & Courts Committee (Dec. meeting).
