INDIANA (CNN) - An Indiana woman told prosecutors she fatally shot her husband to stop him for using his huge gun arsenal against police who were coming to arrest him.
Authorities say the husband was unstable and owned an arsenal of firearms worth more than one-million dollars.
Prosecutors now say Elizabeth Roberts stopped a potential mass shooting.
Court documents suggest Gary Roberts was in a tailspin prior to his death. He had become erratic, unstable, dangerous and suicidal.
Last Friday his wife went to the Hancock County Sheriff's Department and told officers she feared for her husband's safety and well being.
She also told them her husband was a gun collector and had amassed an arsenal of weapons.
According to Michael Griffin, Hancock Co. Prosecutor, "Quite a gun collection. Gary had maintained and from my understanding reconditioned a number of those weapons."
Included in the collection were .50 caliber machine guns. A Youtube video shows you the size and power of the weapon. The army uses them to stop vehicles and shoot through brick walls.
Roberts had more than one in his basement along with sniper rifles, assault rifles, shot guns and handguns.
After talking with police last Friday morning, Elizabeth Roberts returned home expecting officers to come get her husband within 30 minutes.
When they didn't arrive, she says she told her husband they were coming. That's when, according to the court records, Gary Roberts threatened to shoot and kill any officers that entered his home.
Fearful of a mass shooting at her home, Roberts told police she shot and killed her husband.
Prosecutor Griffin says her decision likely saved the lives of multiple law enforcement officers. "I think it is time in this country that we stop mass gun violence, and I am firmly convinced that is exactly what Elizabeth Roberts did."
After investigating the shooting, prosecutors released Elizabeth Roberts. No charges were filed since the shooting was found to be in the defense of others, which is allowable under state law.
If you are wondering about the weapons in Gary Roberts' arsenal, local station WISH reported they were all legally purchased with the proper licenses and permits.