In the summer of 1947, Guay met and started an affair with 17-year-old waitress Marie-Ange Robitaille (she told Guay she was 19). Robitaille knew Guay was married and had a child, but Guay introduced himself to her parents as a young single man under the alias of "Roger Angers". In about a year, Guay was calling Robitaille, whom he was now regularly meeting, on the phone two or three times a week. In November 1948, Guay's wife learned about the affair and told Robitaille's parents, who then kicked their daughter out of their house. Robitaille contacted Guay, who then called Pitre. Guay and Pitre were close friends, with Pitre saying she was like a mother to the younger man. Pitre owned a boarding house near where Guay and Robitaille met, and had helped arrange some of their meetings. Guay asked Pitre if she could take in Robitaille, to which she agreed. Pitre herself moved a week later, while Guay paid for Robitaille's rent. Robitaille's parents quickly changed their minds about kicking their daughter out. However, it was difficult to communicate with her. Afraid of her parents causing trouble if they found out where she was, Robitaille pretended that she was living in Montreal. In early 1949, however, she decided she wanted to return home and leave Guay. Robitaille borrowed $50 from the owner of the restaurant where she worked and bought a railroad ticket to Montreal. However, Guay followed her to the train and told her that if she didn't come back, he'd make a scene. Robitaille went back with Guay to the apartment. Guay then warned Robitaille against escaping by burning her gloves and going to bed wearing her coat. The next morning, he cashed in her unused train ticket. In April 1949, Guay offered a family friend, 21-year-old Lucien Carreau, $500 to kill his wife. His plan was for Carreau to kill Rita with poisoned wine. Carreau called Guay crazy and refused. In June 1949, Guay's wife became fed up with her husband, took their daughter, and moved in with her mother. Robitaille finally left Guay, returned to her parents, and got a different job at a closer restaurant. As Robitaille was walking to work one day in June, Guay confronted her, pulled out a gun, and threatened that if she didn't return to him, he'd shoot himself, and maybe her as well. Robitaille refused. Guay persisted, but fled after a policeman heard them arguing and approached the two. The officer escorted Robitaille to her workplace and waited to see if Guay would return. When he did, Guay was arrested and charged with attempted assault with a deadly weapon. Guay called Pitre, who got him a lawyer. The lawyer managed to get Guay's charge reduced to illegally carrying a firearm. Guay was fined $25 and set free the following morning. Two days later, Guay called Robitaille and said they had to meet. She reluctantly agreed. Guay told her his wife was going to have her arrested for damaging his reputation. Guay said Robitaille needed to immediately flee to Montreal and hide there until the threat went away. Robitaille fled to Montreal with Guay. There, he bought her some new clothes, and apparently paid so much attention to her that she agreed to fly with him to
Sept-Îles. However, the two were fighting once more within a week. At the end of July, Robitaille left Guay once more. Guay gave her a note as she left. "I love you terribly," it read. "We'll be together again very soon." The end of the note instructed Robitaille to destroy it afterwards, but she did not. At this point, Guay became serious about trying to kill his wife. He believed the only way he could be with Robitaille would be to marry her. Given the era and circumstances, a divorce was difficult to obtain. Since Guay's unfaithfulness was well-known, he would be the first suspect if his wife was killed. Guay recruited Ruest and Pitre, both of whom were suffering financial troubles, for his plot. Guay offered Ruest money and a discount on a ring that he wanted to buy for a woman. As for Pitre, she owed Guay $600, a debt he offered to cancel in exchange for her assistance. Pitre went to a hardware store and found it was impossible to buy dynamite in Canada without signing for it, so she gave a false name. She told the clerk that she was buying on behalf of a woman who wanted to destroy some tree stumps. She bought 20 half-pound sticks of dynamite, 15 detonating caps, and a 30-foot length of fuse. She wrapped the dynamite in a package, which she gave to Guay. Guay took the package to Ruest and, late that night, started on a holiday with his wife. Rita thought the vacation was supposed to be a reconciliation, and Guay acted very kind to her. Guay and Ruest decided to rig a time bomb. As they were planning, Pitre proposed an alternative plan. They could enlist the help of her neighbour, a taxi driver who she was on good terms with. Pitre said the driver could take Guay's wife for a ride with the bomb in the trunk. At a certain point, he would pretend that something had gone wrong with the engine, and he and Guay would get out and look for help, leaving Rita by herself. After a few minutes, the bomb would explode. Guay and Ruest encouraged Pitre to follow through on her plan. They listened from hiding as she talked to the taxi driver. However, the man said he wasn't willing to destroy his cab. Guay decided to blow up an airplane while his wife was on board. To convince his wife to board the plane, he gave her two suitcases of jewelry which he had in storage since early August. She agreed. Guay contracted a $10,000 insurance policy on his wife on the day of the flight. == Flight 108 ==