Delivery driver comes forward with new evidence in ‘Making a Murderer’ case, points finger at another one of Steven Avery’s nephews Jessica Schladebeck Lawyers for Steven Avery, an accused killer at the center of the hit Netflix docuseries “Making a Murderer,” requested the case be sent back to circuit court after they were contacted by a newspaper delivery driver, who claimed to have new information in the case. Avery and his 31-year-old nephew, Brendan Dassey, are both currently serving life sentences for the murder of Theresa Halbach. The young photographer vanished Oct. 31, 2005 shortly after a visit to Avery’s home, where she snapped images of a car he intended to sell.