An elderly woman allegedly shot and killed her neighbour in a heated argument about his barking dog, before turning the gun on the victim's wife. Silvana Erzembergher, 71, is said to have shot Luigi Casati, 62, three times in the chest outside their apartment block in Treviglio, northern Italy, last month. His horrified wife, Monica Leoni, 57, rushed to his aid after watching the events unfold from her balcony. But Erzembergher allegedly shot her twice in the leg using a powerful Magnum-style revolver. Horrifying phone footage of the aftermath shows Mr Casati's body sprawled on the tarmac while his wife sits beside him cradling their pet dog. Erzembergher, with her grey hair in a neat bun, was then allegedly seen walking around waving the deadly pistol. The double shooting took place at around 7.40am on Thursday, April 28. Continuous threats: 'I'll kill you all' Erzembergher, a retired peddler, had moved into the housing estate around a decade...