Dean was born to John and Mary Winchester January 24, 1979 in Lawerence, Kansas. When he was four years old, he was excited at his brother Samuel Winchester’s birth. Six months later, his life was destroyed when Balthazar entered their home and killed Mary. John handed Sammy into four year old Dean’s arms and told him to run. Since then he has taken care of his brother, never truly letting him go.
Raised on the road, trained to hunt Vampires, Dean learned to live the life of a nomad. He barely stayed in one school long enough to make friends, but remained loyal to his father John Winchester and brother Sammy. Among the few bright moments in his life are when he and Sammy stayed with Bobby Singer who taught him everything about cars.
As he got older he began to take hunts on his own, running into Maxine Guevera and Logan Cale. Not truly understanding Vampires and the Clan System, he just figured that Vampires weren’t all bad like his father had preached. When he returned home from the hunt he discovered that Sammy had been keeping secrets, and had left the family for college.
Four years later he showed up on Sam’s doorstep with news: their dad had gone missing while hunting. After following a few leads and finding nothing, Dean took Sam back to Stanford, only to discover that Balthazar had come back into their lives, killing Sam’s girlfriend. Swearing to hunt the man down, Sam set out again on the hunt, with Dean.
Balthazar soon found them, and Dean willingly handed his life over to save Sam’s.