When Pamela first arrived in season seven, viewers gained insight into Marty’s heartbreaking upbringing.
It was revealed he didn’t have a good relationship with his father Gordon John Brandel because he was abusive and an alcoholic.
Deeks revealed, when he was 11 years old his father got drunk and pointed a shotgun at him and his mother.
As a youngster, Deeks was able to grab another gun and shot his dad in self-defence.
Although, everyone survived it was made clear the moment had more of a phycological impact on the investigator.
NCIS LA season 14 continues Sundays on CBS in the US. A UK release date has yet to be announced.