The team are asked with investigating the murder behind a retired Marine Colonel with the prime suspect being the Marine's teenage son but Gibbs soon begins questioning Vance's motives for assigning the case to the team.
The one who put Nick Peyton at the crime scene involving his dead father. Blamed Nick for getting his daughter Megan into drugs which eventually resulted in her death from overdosing on drugs. He also strongly believes that Nick should have gone to jail.
As a favour for a friend, Vance has Gibbs and the team assigned to a case where a drug-addicted teenager Nick Peyton is suspected of killing his father, Colonel Yale Peyton.
The first time NCIS interviews Nick, Gibbs takes on the role of good cop while Tony plays bad cop.
Later you find that Vance misled Gibbs, and was actually good friends with the deceased, so had a personal interest in the case
It is eventually revealed that Donna Peyton, Nick's runaway mother, is actually the one responsible for killing Yale Peyton in a fit of rage as she attempted to have a reunion with her son, Nick, but her husband refused.