The Alabama teen who allegedly stabbed his mother to death and severely injured his father in a violent knife-wielding attack at their home has been identified as the military couple’s eldest son, Brandon Baker. Brandon, 17, was arrested on murder and attempted murder charges Sunday following the shocking bloodbath in which he butchered his mother, Samantha Baker, 37, and left his father, Lance Baker, 46, bloodied and begging for his life. Cops hadn’t released the teen’s name due to his age, but a next-door neighbor in the Bladwin County neighborhood where the horror occurred confirmed to The Post on Tuesday…