Suicide By Cop - Tragic Oregon Gunman Should Not Have Had a Weapon

As a nurse, my question about the tragic explanation for the Oregon mall shooter being driven by a "suicide by cop" motive, whereby he killed two innocent people before shooting himself, raises a public health issue about how suicidal people can buy guns?
(Since writing this it's been determined the Oregon shooter sole the assault weapon but he knew the person who owned it....Will the person who owned the gun be charged with manslaugher for this crime? Who needs assault weapons except to kill people?
PORTLAND, Ore. • The gunman who killed two people and himself in a shooting rampage at an Oregon mall was 22 years old and used a stolen rifle from someone he knew, authorities said Wednesday.

Jacob Tyler Roberts had armed himself with an AR-15 semiautomatic rifle and had several fully loaded magazines when he arrived at a Portland mall on Tuesday, said Clackamas County Sheriff Craig Roberts.

How did this sick intentioned man gain access to an assault weapon?  

In my experience, people motivated by the "suicide by cop" brutality often put others in harms way, while intending to bring harm on themselves.  These individuals usually have a documented mental health history and should, therefore, be prohibited from gun purchases.  Without a doubt, regardless of the individual motive, if the gunman were unable to buy or obtain a gun, there were would be two less causalities in today's account of the Oregon mall shooting. In this case, the National Rifle Association mantra "guns don't kill, people do", is as misguided as the man who pulled the trigger on innocent people.  In a "suicide by cop" incident, innocent people are often put in harms way.  They intend to harm themselves without regard for who might be caught in the vice of their desperation.  These people should never be allowed access to any deadly weapons.  

Definition of Suicide by Cop:  "Suicide by cop is a method in which a suicidal individual deliberately acts in a threatening way, with the goal of provoking a lethal response from a law enforcement officer or other legitimately armed individual, such as being shot to death.  Other names include death by cop, suicide-by-police, copicide and blue suicide (a reference to the blue uniforms worn by many police officers). Two technical terms used in research are officer- (or police-) assisted suicide and victim-precipitated homicide, though these are much broader and encompass other situations beyond this subject."

Jacob Roberts may have been motivated by a broken relationship. Sadly, the killer's actions are being second guessed as having been motivated by a relationship breakup.  Obviously, the killer exhibited some irrational behavior in advance of this traumatic behavior.  Access to mental health counseling could certainly have intervened in this tragedy, especially if the perpetrator of the crime had been preventated from buying a gun.

Regardless of what motivated the killer's intentions, the undesputable fact remains crystal clear - if the killer had no gun there would have been no mall shooting. Prior to this shooting, without guns, there would have been no theater mass killing in Denver, no school shootings, no assassination killings of political officials and far fewer domestic violence murders, as in the incident involving a Kansas City football player.

Hundreds of preventable deaths will be elimianted by stronger gun control of unnecessary assault weapons; but increasing revenue for mental health programs to help prevent the "suicide by cop" traumas is also vitally important. Both actions will save innocent lives.

Assault weapons purchases are totally uncessary. Moreover, they create a public health hazard by increasing the number of preventable deaths.  It's impossible to understand how politicans continue to support the sale of deadly assault weapons when there's virtually no proof that they create a safer "anything".

Hundreds of dead people are the result of politicians who continue to block gun control legislation.  There's no end to this traumatic misery.  As a result, we've become a nation in perpetual mourning.  

It makes no sense, as the mortalities continue to rise.  

Second Amendment Rights were never intended to result in the deaths of thousands of innocent people, who find themselves at the mercy of mentally ill individuals. Assault gun control and improved mental health coverage must respond to this growing public health tragedy.