Glen Purvis

D-N-A is a helpful tool in criminal investigations. It can be used to identify the guilty, or it can be used to exonerate those who have been wrongfully convicted. Since 2001, 41 people in Texas have been freed from prison as a result of D-N-A evidence that contradicted jury verdicts. Dr. Kim Rossmo is a former police detective who teaches at Texas State. Rossmo, a University Endowed Chair in Criminology, is conducting research into what causes investigations to fail and the important role that D-N-A can play. Dr. Rossmo's book Criminal Investigative Failures will be available November first.