The attorney for a Wisconsin inmate featured in the hit Netflix documentary series Making A Murderer has filed a motion seeking permission to perform extensive scientific tests on evidence she believes will show he’s innocent.

Prosecutors believe Steven Avery killed Teresa Halbach in his family’s Manitowoc County salvage yard in 2005.

Netflix’s Making A Murderer (Netflix)

A jury convicted him in 2007 and he was sentenced to life. He insists the authorities framed him.

His attorney, Kathleen Zellner, filed the motion for testing on Friday. She told reporters outside the courthouse that she wants to date blood and DNA found at the scene to see if it was planted.

Steven Avery in 2007 (Patrick Ferron/AP/Press Association Images)

She said the results will show her client isn’t guilty and someone else killed Halbach.

People starting to gather in front of Manitowoc County Courthouse with signs to "Free Steven Avery"

— Raquel Lamal (@RLamalWGBA) August 25, 2016

She says no one who is guilty would ever agree to such testing.