They didn't
He was part of the 'new generation' of 3D characters, introduced in the early 2000s. Most of what he's done has been non-canon, up to now.
Here's what happens next: Apparently, he joined the Special Forces as a free agent, honed himself as a double-crosser, and found a way into becoming a member of the secret Red Dragon cult society (yep, I didn't apply for that one

) that worked against Earth (go figure). But his cover was blown - and the cult decided to go after his family. One he hadn't a clue of. He got some intel from the SF of his eight-year old son and his mother in Thailand, and rushed to their aid. The mom, a sassy lady, was dead - but she had sent the son to a neighbouring village. He fled with the boy, practically running with the boy piggybacking for days to escape the assassins. Ultimately, with Scorpion's help, he was successful, but after a severe beatdown. He left the boy with Scorpion as he was rebuilding his clan, and went to seek and destroy the Red Dragon. 15 years later, the boy grew as a skilled fighter, but with severe daddy issues - and with no knowledge of what happened to his mother.
Which ultimately makes me go even more