For the Zoloft link to have weight there would have to be a majority of kids on Zoloft out killing folks, not a number of the mass murderers on Zoloft.
The better question might be what indicators are there for mass murder and how effective are drugs like Zoloft in combating it. Idle speculation isn't helpful. Just using the last few incidents is junk.
1991, same year as Luby's- 28 yo Gang Hu kills 5 wounds 1- no known mental issues or prescribed medication.
1992 Eric Houston(20) blames his school for a failure to hold employment- 4 dead, 10 wounded- no known prescription, or diagnosis of mental problems
Kip Kinkel, aged 15, was never on Zoloft but was very disturbed- he killed his parents, 2 students and wounded 25 others.
Mitchel Johnson(14) and Andrew Golden(12) killed 5 and wounded 10- no meds. that was 1998.
1999 had Columbine with one of the two on medication and 4 adults between 36 and 47 committing mass murder in the same year.
You have to go to 2004 for the next kid, but you walk over quite a few bodies from other mass murderers. Jeff Weise, who was on Prozac, but not because his parents wanted to medicate him. His life prior to the shootings and suicide is such a crapfest- dad commits suicide at a police standoff, mother a drunk is badly injured and in a nursing home... he bounced from place to place until he killed his grandfather and then 8 more people.
2007 and the Virginia Tech murderer Cho(20), while he had been diagnosed with several mental problems in grade school I can't find any report of being medicated.
Robert Hawkins(19) had been in and out of mental healthcare since age 6, threatened to kill a relative at age 14- difficult to blame any meds for his violent nature.
Sulejman Talovia(18) never took zoloft but killed 5, wounded 4.
2008's Wesley Higdon had no record of mental illness or prescribed drug use.
I can't find any record of Jared Loughner ever being prescribed medication for his mental problems.
So I'd say it isn't medication causing mass murderers but it seems people with a mental defect do most the killing- i have to wonder how many other mass murderers are not killing due to proper treatment- and how many will 'turn' if taken off their meds....
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So it remains very debatable and certainly not supportive of the thought processes you're ascribing to medicated patients.
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