 It is later revealed Mercedes' partner Doctor Browning killed Lynsey to protect Mercedes and in October 2013, Mercedes, Cindy Cunningham (Stephanie Waring) and Lindsey Butterfield (Sophie Austin) attacked, murdered and covered up the murder of Doctor Browning.In the run-up to her 2014 departure, Mercedes was involved in feuds with Freddie Roscoe (Charlie Clapham) and Grace Black (Tamara Wall) and mourning for her sister Carmel (Gemma Merna) following a train crash, which Mercedes was also involved in.Since her return in February 2015, her storylines have included reuniting with her family, her relationship with Joe and delivering a stillborn son named Gabriel, exposing Lindsey as the Gloved Hand Killer, Silas returning and targeting her again, and her feud with Joanne Cardsley (Rachel Leskovac) over Joe, who later dies during the show's "Halloween Spooktacular" episodes.