Laurie Dann

Some blamed Dann's family for defending and protecting her in spite of the signs of her deteriorating mental health. Investigations were hampered by the Wassermans' refusal to be interviewed by police or to provide access to Dann's psychiatric records—the records were eventually obtained by court order. On the night of Dann's death, the Wassermans allowed only a very brief search of her bedroom, after which they cleaned it and removed potential evidence. The police were criticized for not sealing off Dann's room as part of the crime scene. Parents of the shooting victims subsequently sued the Wasserman family for damages.

At about 9:00 a.m. on the 20th, Dann arrived at the home of the Rushe family, former babysitting clients in Winnetka, Illinois, to pick up their two youngest children. The family had just told Dann they were moving away. Instead of taking the children on the promised outing, she took them to Ravinia Elementary School in Highland Park, Illinois, where she erroneously believed that both of her former sister-in-law's two sons were enrolled (in fact, one of Dann's intended targets was not even a student at the school). She left the two children in the car while she entered the school and tried to detonate a fire bomb in one of the school's hallways. After Dann's departure, the small fire she set was subsequently discovered by students, and quickly extinguished by a teacher. She drove to a local daycare attended by her ex-sister-in-law's daughter and tried to enter the building with a plastic can of gasoline, but was stopped by staff.

Dann continued to make numerous hang-up phone calls to her former in-laws and babysitting clients. Eventually, the calls escalated to death threats. An ex-boyfriend and his wife also received dozens of threatening calls. In May 1988, a letter, later confirmed to have been sent by Laurie Dann, was sent to the hospital administration where her ex-boyfriend then worked, again accusing him of sexual assault. Since the phone calls were across state lines, the FBI became involved, and a federal indictment against Dann was prepared. However, the ex-boyfriend, fearful of publicity, and concerned about Dann getting bail and then attempting to fulfill her threats against him, decided to wait until other charges were filed in Illinois. In May 1988, a janitor found her lying in the fetal position inside a garbage bag in a trash room. This precipitated a search of her room and her departure back to Glencoe.

During the days before May 20, 1988, Laurie Dann prepared rice cereal snacks and juice boxes poisoned with the diluted arsenic she had stolen in Madison. She mailed them to a former acquaintance, ex-babysitting clients, her psychiatrist, Russell Dann, and others. In the early morning of May 20, she personally delivered snacks and juice "samples" to acquaintances, and families for whom she had babysat, some of whom had not seen her for years. Other snacks were delivered to Alpha Tau Omega, Psi Upsilon, and Kappa Sigma fraternity houses and Leverone Hall at Northwestern University in Evanston. Notes were attached to some of the deliveries. The drinks were often leaking and the squares unpleasant-tasting, so few were actually consumed. In addition, the arsenic was highly diluted so nobody became seriously ill.

Just before their divorce was finalized in April 1987, Laurie accused Russell of raping her. There were no physical signs supporting Laurie's claim, although she passed two polygraph tests. In May 1987, Laurie accused Russell of placing an incendiary device in her home. No charges were filed against Russell for either alleged event. Laurie's parents believed her claims and supported and defended her throughout. By this time, Laurie Dann was being treated by another psychiatrist for obsessive-compulsive disorder and a "chemical imbalance"; the psychiatrist told police that he did not think Laurie was suicidal or homicidal.

In the summer of 1987, Dann sublet a university apartment in Evanston, Illinois. Once again, her strange behavior was noted, including riding up and down in elevators for hours, wearing rubber gloves to touch metal, and leaving meat to rot in sofa cushions. She took no classes at the university.

In the fall of 1987, Dann claimed she had received threatening letters from Russell and that he had sexually assaulted her in a parking lot, but the police did not believe her. A few weeks later, she purchased a .32-caliber Smith & Wesson revolver.

With her condition deteriorating, Dann and her family sought specialized help. In November 1987, she moved to Madison, Wisconsin, to live in a student residence while being observed by a psychiatrist who specialized in obsessive-compulsive disorder. She had already begun taking clomipramine, a drug for OCD, and her new psychiatrist increased the dosage, adding lithium carbonate to reduce her mood swings and initiating behavioral therapy to work on her phobias and ritualistic behaviors. Despite the intervention, her strange behavior continued, including riding elevators for long periods, changing television channels repetitively, and an obsession with "good" and "bad" numbers. There were also concerns about whether she was bulimic.

Dann purchased a .22 semi-automatic Beretta at the end of December 1987. In March 1988, she stopped attending her appointments with the psychiatrist and behavior therapist. At about the same time, she began to make preparations for the attacks. She stole books from the library on poisons, and she diluted arsenic and other chemicals from a lab. She also shoplifted clothes and wigs to disguise herself and was arrested for theft on one occasion. Both her psychiatrist and her father tried to persuade her to enter the hospital as an inpatient, but she refused.

In August 1986, she contacted her ex-boyfriend, who was by then a resident at a hospital, and claimed to have had his child. When he refused to believe her, Dann called the hospital where he worked and claimed he had raped her in the emergency room.

In September 1986, Russell Dann reported he had been stabbed in his sleep with an icepick. He accused Laurie of the crime, although he had not actually seen his attacker. The police decided not to press charges against Laurie based on a medical report which suggested that the injury might have been self-inflicted, as well as Russell's abrasive attitude towards the police and his failed polygraph test. Russell and his family continued to receive harassing hang-up phone calls, and Laurie was arrested for calls made to Russell's sister. The charges were dropped due to lack of evidence.

Laurie and Russell Dann separated in October 1985. The divorce negotiations were acrimonious, with Laurie claiming that Russell was abusive. In the following months, the police were called to investigate various incidents, including several harassing phone calls made to Russell and his family. In April 1986, Laurie Dann accused Russell of breaking into and vandalizing her parents' house, where she was then living. Shortly after, she purchased a Smith & Wesson .357 Magnum, telling the salesman that she needed it for self-defense. The police were concerned about her gun ownership and unsuccessfully tried to persuade Dann and her family that she should give up the gun.

She met and married Russell Dann, an executive in an insurance broker firm in September 1982, but the marriage quickly soured as Russell's family noted signs of obsessive-compulsive disorder and strange behavior including leaving trash around the house. She saw a psychiatrist for a short period, who identified her childhood and upbringing as a cause of her problems.

In 1980, with the relationship failing, Dann moved back to her parents' home. She then transferred to Northwestern University to complete her degree, but she dropped out of all her classes and never graduated.

Those who knew Dann described her as shy and withdrawn. She graduated from New Trier High School in Winnetka, Illinois, in 1975, and although she had poor grades in high school she was able to attend Drake University in Des Moines, Iowa. When her grades improved, she transferred to the University of Arizona with the goal of becoming a teacher. She began dating a pre-med student, and the relationship soon became serious, but she was becoming possessive and demanding. In the summer of 1977 she attended the University of Wisconsin in Madison, taking a course in home economics.

Laurie Dann (née Wasserman; October 18, 1957 – May 20, 1988) was an American murderer who shot and killed one boy, Nick Corwin, and wounded two girls and three boys in a Winnetka, Illinois elementary school. She then took a family hostage and shot another man, non-fatally, before killing herself.