Steven Avery's Mother He Didn't Kill Teresa ... She's Still Alive

1/15/2016 10:22 AM PST BY TMZ STAFF

Steven Avery is innocent, because the victim isn't dead ... so claims his mom.

The mother of "Making A Murderer" convict Steven Avery appeared on WAAF radio in Boston and suggested Teresa Halbach herself might be in on the corruption.

She never explains why Teresa would go into hiding to frame Steven.   

Details.