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Jon Donnelly was a former Navy engineer involved in a five million dollar electronic heist alongside Montrell Perez and Joey Gale. His sister was Kristin Donnelly who had befriended "Jason Tedrow" aka NCIS Special Agent G. Callen.

While talking to Tedrow/Callen, Donnelly was gunned down in a drive-by shooting with Neil Corby later being revealed as his killer.


  • David Monahan previously appeared in the original NCIS series in the Season 1 episode, Sub Rosa (episode).

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