[Ruy Dias de Bivar]

***That said, I also read that the first mass murder shooting in a school occurred in 1990.***

Several attacks happened before that.

http://en.wikipedia.org/wiki/Bath_School_disaster

http://en.wikipedia.org/wiki/Cokeville_Elementary_School_hostage_crisis

http://en.wikipedia.org/wiki/1976_Chowchilla_kidnapping

http://en.wikipedia.org/wiki/Oklahoma_City_bombing

[Ruy Dias de Bivar]

The last one OKC was not a school but there was a day care there in which 19 children died.

Then there is a photo of people trapped in the WTC on 9-11-2001 in which it looks like one woman is holding a baby.

[detective]

“the first mass murder shooting in a school occurred in 1990”

The first mass murder school shooting did occur in 1990. The Bath School disaster was a bomb planted by the 55 year old School Board Treasurer angry at being defeated in an election for City Clerk. Cokeville in 1986 was a former Town Marshall disgruntled about being fired 6 years earlier who held a bomb and demanded $2 million dollars ransom per hostage. Chowchilla in 1976 was 3 men who kidnapped kids from a school bus and demanded ransom. Oklahoma City in 1995(after 1990) was the bombing of an office building.

None of these were mass school shootings. One occurred after 1990.

[IamConservative]

Several attacks happened before that.

The article was very specific. Mass Murder shootings in schools where the perp "succeeded" in killing more than 4. Not bombs, gas cans, etc.