was filmed for a proposed DVD release, but the project was abandoned due to poor audio quality. In August 2006, the band returned to Europe where they appeared alongside Michael Schenker Group, Rose Tattoo, Metal Church, and Tourettes Syndrome and performed at the Wacken Open Air Festival. Mortal Sin's fourth album An Absence of Faith was recorded in February 2007 at The Basement Studios in Sydney with producer Phil McKellar. It was released in July 2007 in Australia through Riot! Entertainment and in Europe in September through Germany's Armageddon Music. In late 2007, the band also released reissued versions of Mayhemic Destruction and Face of Despair through Riot!, both of which contained bonus tracks. Mortal Sin returned to Europe in March 2008 as support to Overkill to tour and promote the new album. In the summer of 2008, the band played some festival gigs like the Wacken Open Air and Jalometalli. Back in Australia, they supported Judas Priest and Testament in 2008 and late in 2009 undertook a two-week tour of South America, for which Mick Sultana was temporarily replaced by Andrew Lilley. In 2011 Ryan Huthnance replaced Sultana ahead of an Australian tour with Overkill and in July Mortal Sin finished recording a new album, Psychology of Death. In November they toured nationally with Destruction and then completed a European tour with Exodus, Sepultura and Heathen in late 2011 as part of the "Thrashfest Classics" tour. Departure of Mat Maurer, fourth split and possible reunion (2012–present) In 2012, Mat Maurer announced his departure from Mortal Sin. Dave Tinelt from the Wollongong band Nekrofeist was announced as his replacement but after only two live performances, Luke Cook and Nathan Shea left the band, ending Mortal Sin on 30 April . Luke Cook has performed with Wollongong band Carbon Black and Sydney thrash band Killrazer. Wayne Campbell rejoined Temtris in January 2015. Mick Burke, guitarist from 1987 to 1990, died on 24 August 2017. His death was reported on the band's Facebook page. On 30 August 2018, former drummer Wayne Campbell teased a possible reunion on his Facebook page, writing, "If Mortal Sin played a show again would you come to see?". As of October 2021, there have been no further updates on a reunion. In 2020, Mortal Sin were featured on Australian thrash metal documentary Thrash or Fuck Off. Vocalist Mat Maurer talked about the hardships Mortal Sin had to