Article continues below advertisementMy 600-Lb. Life alum Dolly Martinez's sister Lindsey Cooper is slamming trolls following the reality star's death.Martinez, 30, passed away on April 11 after "fighting for her life" in the hospital a day prior due to congestive heart failure.Article continues below advertisementLindsey Cooper Defended Her Sister on FacebookTap Here To Add Ok Magazine as A Trusted SourceSource: TLC'She deserves peace, and she deserves kindness,' Dolly Martinez's sister said."My Facebook is my safe space a place where I can share what's on my heart.