This article claims that Lee Rhiannon, Roland Browne and Rebecca Peters of the NCGC, along with partner journalists, taught mass killers how to get guns to perform massacres.

You need to check the sources. Here they are!

Cantor, C. (2001). Civil Massacres Ethological Perspectives. The ASCAP Bulletin Vol 2 No 1 , 29-31.

Cantor, C., Mullen, P., & Alpers, P. (2000). Mass homicide: the civil massacre. J Am Acad Psychiatry Law 28:1 , 55-63.

Cialdini, R. (2001). Influence: Science and Practice. Allyn and Bacon.

Cramer, C. (1993). Ethical problems of mass murder coverage in the mass media. Journal of Mass Media Ethics 9 .

Hansen, J. (1995, 10 2). Tassie Guns, featuring Peters, Rebecca; Browne, Roland. . A Current Affair . Australia: NINE Network.

Lovibond, J. (1996, 5 21). Hobart gun death related to TV show. Hobart Mercury , p. 2.

Mullen, P. (1997, 3 4). Copycats to Blame for Massacres Says Expert - Courier Mail. (K. Hannon, Interviewer)

Phillips, D. P. (1980). Airplane accidents, murder and the mass media: Towards a theory of imitation and suggestion. Social Forces 58 , 1001-1024.

Pinker, S. (1999). In How the Mind Works (p. 672). Norton and Company.

Meanwhile there was an item in todays paper about a SEVEN year old boy taking a 22 gun to school and waving it about in a threatening manner in/as response to a minor argument to some of his fellow school children.
What kind of deranged parent would allow, or rather give a gun to a 7 year old to take to school?

As I stated in a post a couple of days ago:

There are numerous examples of people who have gone on a shooting rampage and killed their classmates, co-workers, members of their family and often took their own lives, then it was discovered they were taking antidepressants. It initially appears the person was mentally ill and went on a rage but when these cases have actually been looked at closely they find the person did not have any violent tendencies and in most cases was not even suicidal before they started treatment with their antidepressant medication.

SSRIs, or selective serotonin reuptake inhibitors, are the pharmaceutical company’s latest cash cows. Their use has skyrocketed in the last ten years. Nicknamed “Chemical Babysitters” and designated anti depressants, they are causing dozens of murders, thousands of psychoses and are altering the minds of millions of users. All but a very few of the latest “Mass Murderers” have been on these drugs. Schools encourage parents to put their children on these drugs for the smallest signs of “non conformity”. Schools in the US receive more money for “disabled” students.

SSRIs markedly alter brain chemistry, particularly drugs like Prozac. A few people have tried to warn authorities, but no one is listening. And SSRIs don’t backfire in children only.

Selective Serotonin Reuptake Inhibitors are commonly used to treat depression in children and adolescents. In 2005, the US Centre for Disease Control reported that 118 million prescriptions had been written for anti-depressants, and that the number of people using anti-depressants had “almost tripled between the periods 1988-1994 and 1999-2000”.

As more and more people are given SSRIs to combat depression, mounting evidence suggests that the side effects of SSRIs can lead to violent behavior and suicide. Many of the high fatality school shootings of the past 10 years have involved shooters who had been prescribed SSRIs. An in depth look at school shootings, and the commonly known side effects of SSRIs, reveals these drugs to be a primary factor leading to violence.

It will be interesting to see if the latest ‘killer’ was on SSRIs.

Got to agree with Geoff on this one.
This reference states the case:

http://herbdocblog.com

Meanwhile of course much of the dreadfully sane USA population is zonked out on mood altering drugs of one kind or another.
Exactly as described in Huxley's Brave New World.
Zombie nation rules OK!

It could even be said that Big Pharma is systematically killing off the human population. But not necessarily intentionally, although some conspiracy theorists might argue otherwise.

A comment on SSRI and murder. The deranged people-haters kill en masse not because of medication, or their internal angst, or any other of these factors (none of which would explain why America is the gun massacre capital of the world) but because they could get their hands on a gun that would do the job. THAT explains why America is the gun massacre capital of the world.

All the mealymouthed excuses for the massacres, down to the fatuous proposal that the news media should hush it up, boil down to "I want to be able to own a gun because I'm inadequate otherwise, so please don't rule it out.".

BTW, the quote marks in Geoff of Perth's reference to the 'killer' prompt the question: how many people does someone have to kill, and how obvious does it have to be that he's the perp, to lose the quote marks round the word killer?

In respect of medication and mental illness, I draw your attention to the guidelines in the article.

- Do not use words that might encourage people to think their own life patterns are similar to those of the perpetrators; emphasize the uniqueness of mental illnesses and situations of individuals.

This is very important. As pointed out in other comments, there are MILLIONS of people with mental illnesses, on medication, who present little threat to anyone. Making them all feel hated and feared, like the activists did to shooters 1996-1999, is just creating division and fear in society for self-righteousness. It is a wrong against the ordinary people.