She was followed by her husband who was armed with a handgun and was shooting at his wife , police said .
Edgewater police had just arrived on the scene when they said they heard a gunshot and saw Karen Johns run screaming out of her house .
Karen Johns was followed by Karen Johns ' husband who was armed with a handgun and was shooting at his wife , police said .
Edgewater police had just arrived on the scene when they said they heard a gunshot and saw Karen Johns run screaming out of her house .