Season 1 Investigation Discovery , 2009 - 2010 Season 2 Investigation Discovery , 2010 Season 3 Investigation Discovery , 2011 Season 4 Investigation Discovery , 2011 - 2012 Season 5 Investigation Discovery , 2012 Season 6 Investigation Discovery , 2012 - 2013 Season 7 Investigation Discovery , 2016 Season 8 Investigation Discovery , 2017 Season 9 Investigation Discovery , 2018 Season 10 Investigation Discovery , 2022 Season 11 Investigation Discovery , 2023