The Killing returns for its final season, exclusively on Netflix this summer. And this time, Linden and Holder will have to square off with a couple of young recruits from an all-boys military academy. Faced with a mass slaughter while they deal with the fall out from their own personal lives, the two detectives must investigate a new murder that has left a family dead with just one survivor, who was shot in the head.

Netflix has released new photos, which sets up a couple of our suspects. Take a look at who might have brought about this grisly massacre:

Kyle Stansbury (Tyler Ross)

Kyle Stansbury, the black sheep of a wealthy, well-connected family, is the sole survivor of his family's brutal massacre. He's a gentle soul who's been battered most of his life by the viciously competitive, dog-eat-dog world of Seattle's best and brightest.

AJ Fielding (Levi Meaden)

A charismatic, over-achieving, attractive student, AJ attends the same Academy as Kyle, where he thrives and is regarded as a leader and success story by the students and administrators.

Lincoln Knopf (Sterling Beaumon)

Lincoln is a deeply troubled boy who wears his anger and instability on his sleeve. He has a specific hatred toward women -- anger that seems as though it may erupt at any moment.

ABOUT SEASON 4:

The fourth season of The Killing picks up right after the season three finale. As Detective Linden (Mireille Enos) and Detective Holder (Joel Kinnaman) struggle to manage the fallout from their rash actions at the end of last season, they are assigned a new case -- a picture perfect family is murdered, survived only by the son, Kyle Stansbury (Tyler Ross), who was shot in the head during the massacre. Joan Allen guest stars this season as Colonel Margaret Rayne, the headmaster of the all-boys military academy where Kyle attends.

The Killing Season 4 debuts on Netflix August 1.