NCIS - Out Of The Frying Pan

Gibbs and his team are ordered by Vance to interrogate the suspect in the murder of an ex-marine.  It happens to be the victim's eighteen year old son.  Vance wants them to get him to confess by any means possible.  While Gibbs at first seems to think it is him as he seems cold and unemotional, he quickly changes his mind, even when Vance steps in and gets the kid to confess.  It is revealed that Vance knew the victim, hence the unorthodox assignment and Vance's behaviour.  Once again, as per normal NCIS, there is at least one other good red herring, but the killer is soon revealed, and it is nothing too shocking.  A reasonable but run-of-the-mill episode.  Three Quarters of the way through the season.  Looking forward to the last half dozen episodes.