Season 5-Finale. I need somethings explaining.

Alright, when আপনি watch it, it is meant to be confusing. Jenny will not kill "The Frog" who is La Grenuelli who is Rene Benoit (sorry for misspelling stuff). আপনি are lead to believe in another episode (I believe) that Gibbs killed Rene. Jenny definately didn't kill Rene, though, and আপনি can be sure of that through her reminiscing of how she wishes she had killed him. If আপনি go on surfthechannel.com and look up NCIS, আপনি can rewatch the episodes and watch the S5 finale as well as other related ones. Or, if you're just looking for a synopsis, go on wiki and look at the episode guide for S5. That should clear up the issues. Sorry if this isn't helpful. It is shrouded in mystery even though it's been totally not mentioned in S7 anymore.