EXCLUSIVE

12:10 PM PT -- The Raiders just announced they released Aldon Smith.

Aldon Smith has checked into rehab -- and the people who helped him get there are the parents of the alleged domestic violence victim ... TMZ Sports has learned.

The embattled NFL star was involved in a domestic violence incident Saturday night. When cops arrived, Smith had left the scene and cops were trying to locate him.

Now, we spoke with Smith's fiancee who confirms she is the alleged victim in the incident -- but says the most important thing to her is that Smith gets help for his substance abuse problem.

"I can tell you this ... Aldon called my parents and asked them to take him to rehab," the woman tells us.

"He complied. They went and got him. I was not there. My family took him and had him checked in."