Mother shoots dead her two children, kills family dog, sets fire to her home and commits suicide in the middle of a 'bitter' custody battle with her estranged husband

A mother who was in the middle of a divorce and bitter custody battle shot dead her two young children as they slept and then herself while setting their Pennsylvania home on fire.  Dr Stephen Diamantoni, the Lancaster County coroner, ruled the deaths of 40-year-old Carola Arnau and her two children a murder-suicide after autopsies Wednesday morning. He says Arnau shot her