Foiled or Exposed Plots

Date Location Description

October 12, 1992	Lincoln, Nebraska, United States	A 43-year old graduate student, Arthur McElroy, walked into an actuarial science class at the University of Nebraska-Lincoln and attempted to open fire on about 20 students with a .30-caliber, M-1 carbine. As students reacted by hitting the floor and pulling desks over their heads in anticipation, the gun jammed, and McElroy was apprehended. A court later found McElroy insane. He was taken to the Lincoln Regional Center's Forensic Mental Services unit in December 1992 and is still there as of 2011.
May 1999	Port Huron, Michigan, United States	A 12-year-old, 13-year-old and two 14-year-olds, all boys, planned to outdo Eric Harris and Dylan Klebold at Holland Woods Middle School. They planned to hold up a gun store and then attack the school. Once there, they planned to rape some of the girls and shoot as many as 154 targets which they had drawn up on a list. They had stolen a building plan from the custodian's office but they were all caught within a day of a classmate's report to an assistant principal.
January 30, 2001	Cupertino, California, United States	De Anza College student Al DeGuzman planned a Columbine style school shooting at the school. An employee at a Longs Drugs store developed pictures of DeGuzman posing with his guns and homemade bombs. She and a coworker called police. DeGuzman was arrested when he returned for his photos. Police found Deguzman's bedroom stacked from top to bottom with sophisticated handmade bombs and a map of De Anza College, marked with locations where bombs would be placed. In October, 2002, DeGuzman was sentenced to seven years in state prison. He later committed suicide by hanging himself in his jail cell.
February 14, 2001	Elmira, New York, United States	Jeremy Getman, 18, planned a school attack at Southside High School but it was foiled after students told a teacher that he was carrying weapons. He carried 14 pipe bombs, three smaller bombs, a propane tank, a sawed-off shotgun, and a .22 caliber pistol into the school by a duffel bag and also a book bag full of ammunition. On December 17, 2001, he was sentenced to 8½ years
March 16, 2004	Malcolm, Nebraska, United States	17-year-old Joshua Magee was arrested in the parking lot of Malcolm High School after a school staff member, who saw the youth drinking liquor and putting on a black overcoat, called police. A search of Magee's car produced a bolt-action rifle, 20 bombs and a note stating the he wanted to injure everyone at the school except for three friends. Magee, to whom the school paid close attention after it was reported to faculty that he was experimenting with explosives at home, was charged with attempted murder.
January 25th, 2005	Grand Marais, Minnesota, United States	17-year-old David Riehm was arrested at his home on January 25, 2005 after authorities at Cook County High School turned over a collection of writings and essays to police in which Riehm described in great detail shooting and killing his English teacher. After spending 72 hours at Miller Dwan Hospital, Riehm was released. He was later acquitted of all charges.
October 11, 2007	Plymouth Meeting, Pennsylvania, United States	14-year-old Dillon Cossey was arrested at his home in Plymouth Meeting after a friend told police about his plan to carry out a Columbine style attack on Plymouth Whitemarsh High School. After a police-conducted search of the Cossey residence, officers found a 9 mm Hi-Point Carbine(which he named "Reb" in honor of Eric Harris), over 30 airsoft guns, a dozen knives and swords, 7 homemade explosives (4 which were live), a copy of The Anarchist Cookbook, and several movies about the Columbine High School Massacre, all which were in the boy's bedroom. A .22 rifle and a .22 pistol, which were lent to another acquaintance for safe-keeping, were also recovered by authorities. However, no ammunition turned up in the search, so investigators have concluded that the threat of an attack was not imminent. Even on Cossey's MySpace page, he discussed his admiration for the bank robbers of the North Hollywood shootout as well as for Eric Harris and Dylan Klebold, the Columbine gunmen. In his trial, Cossey confessed that he was going to carry out his shooting to kill the people who had relentlessly bullied him in elementary and middle school. Bullying led his parents to pull him out of public school at the end of his 7th grade year and home-school him. It was later found that he also had contact with Pekka-Eric Auvinen, the perpetrator of the Jokela school shooting, though Cossey apparently had no knowledge of Auvinen's plans. Cossey is currently serving time in juvenile detention and could possibly stay until the age of 21. His mother, Michelle Cossey, faced charges for purchasing the weapons and other charges regarding the welfare of her son.
November 28, 2007	LaGrange, New York, United States	State police arrested two 16-year-old Poughquag students - Patrick Quigley and Joseph Saia - and a 15-year-old student after investigating a threat posted on a MySpace page. The three teens were charged with fourth-degree conspiracy, a felony. The Web page described events to take place at Arlington High School on April 20, 2010, the 11th anniversary of the attack on Columbine High School, police said.
June 4, 2008	Mishawaka, Indiana, United States	A 16-year old boy was arrested after notebook retrieved from his locker at Penn High School stated "I wanna break the current shooting record. I wanna get instant recognition." He and a 33 year old possible accomplice, Lee Billi, were charged with conspiracy. Trials Pending
December 4, 2008	Pottstown, Pennsylvania, United States	15-year-old Richard Yanis was arrested for plotting a school shooting at Pottstown High School after his father reported to police three missing handguns. An investigation revealed that Yanis had stolen the guns from his father and put them into a duffelbag, which he handed to a friend with the words to "hold onto it". After checking the bag Yanis' friend told his mother of the weapons, who then forced him to get rid of them by throwing them into a river. After his arrest Yanis admitted that he had planned to shoot people at his school he didn't like, before committing suicide.
March 11, 2009	Drexel Hill, Pennsylvania, United States	An eighth grade student who attended St. Andrew School in Drexel Hill was arrested after a fellow pupil he attempted to recruit for an attack tipped off authorities. The suspect was then pulled from class and later arrested. Shortly after, two airsoft pistols were found in his backpack, one of them looking very much like a real gun. The plan of the 13-year-old student was to force the school in lock down and shoot anybody who tried to escape. He is charged with terroristic threats and reckless endangerment and is currently held in juvenile detention. He is also charged with burglary for stealing $370 from another school in Drexel Hill on the previous weekend. It is noted that the suspect has a history of mental illness.
October 21, 2009	Monroe, New York, United States	A 15-year-old boy from Monroe was already on juvenile probation when he broke down crying as he admitted he stockpiled bottles of gasoline, makeshift fuses, a torch, a 2-foot (0.61 m) machete and three tanks of propane in a plot to attack former fellow students at Monroe-Woodbury High School.
November 17, 2009	Beauvais, France	A 13-year-old boy, who was said to have had difficulties at his school, was arrested in Beauvais, accused of having planned to shoot his teachers. His parents had called police after they found their son acting strangely and a gun missing. When the boy, armed with a hunting rifle and 25 cartridges, arrived at the school it was already surrounded by police, so he dropped his plans, left the rifle in a field and went to an internet café in the city. That day a parent-teacher meeting was scheduled to discuss his future at the school, and it was suspected that he wanted to prevent this meeting from taking place. He apparently also wrote in a blog the evening before that this was the last day in his life.