Emergency crews flooded a typically quiet street in the private neighborhood of Belforest, Alabama on July 5, after a 17-year-old dialed 911 only minutes after he went on an alleged domestic stabbing spree which left his mother, 37-year-old Samantha Baker, dead, and his father, 46-year-old Lance Baker, in critical condition.

The teen suspect was later identified as the military couple’s eldest son Brandon Baker, a rising high school senior.

What happened to Samantha and Lance Baker? And what led up to the military couple’s eldest son Brandon getting collared for the shocking bloodbath? Here’s what you need to know.