Mea Culpa is the ninth episode from the fifth season of the American crime drama CSI: Crime Scene Investigation, set in Las Vegas, Nevada.
When an unknown fingerprint suddenly appears on a piece of evidence in court, Grissom
must re-open the case and find the real culprit. However, this unexplained phenomenon causes Ecklie
to doubt Grissom's handling of the case. Ecklie then opens an inquiry on Grissom, and questions each of the CSIs about his effectiveness as supervisor. Meanwhile, Sara
investigate the circumstances surrounding the death of a man who shot himself in the leg.
The title of this episode comes from a Latin prayer known as Confiteor
; "mea culpa
" means "my fault".