Monthly Archives: May 2008

Officer Garcia – A Virtual Human to Conduct Police Lineups

I created a virtual human that conducts a photographic, police lineup. Why?

  • Mistaken eyewitness identification is the leading cause of wrongful conviction, about 77%
  • Investigators conducting lineups may inadvertently influence the eyewitness during a lineup
  • Eyewitnesses are often not familiar with the typical computer interface (windows, icons, mouse, pointer)
  • A virtual human may provide that natural human-to-human interaction while removing inadvertent human bias

There were 3 iterations.

Iteration 1

Iteration 2

Iteration 3

The final iteration was compared with a human administering a similar process. Over 250 students were used in the comparison and several factors were measured. Overall, it was shown that the virtual human could fulfill the role of a human administrator.


Five Ventures: Business Competition & Conference



I won first place in the student/non-profit category.

M.S. Thesis:

BRENT SAMUEL DAUGHERTY. A Comparison of Virtual Human vs. Human
Administration of Photographic Lineups (Under the direction of DR.

Brent Daugherty, Sabarish Babu, Lori Van Wallendael, Brian Cutler,
Larry F. Hodges, “Virtual Human versus Human Administration of
Photographic Lineups,” IEEE Computer Graphics and Applications, vol.
28, no. 6, pp. 65-75, Nov./Dec. 2008, doi:10.1109/MCG.2008.125

Daugherty, B., Babu, S., Cutler, B., and Hodges, L. 2007. Officer
Garcia: a virtual human for mediating eyewitness identification. In
Proceedings of the 2007 ACM Symposium on Virtual Reality Software and
Technology (Newport Beach, California, November 05 – 07, 2007). S. N.
Spencer, Ed. VRST ’07. ACM, New York, NY, 117-120. DOI=

Cutler, B. L., Daugherty, B., Babu, S., Hodges, L., & Van Wallendael,
L. R. (in press). Creating blind photoarrays using virtual human
technology: A feasibility test. Police Quarterly.


Officer Garcia has appeared in international publications like NewScientist and ABC News (Australia), among others.