Seung-Hui Cho killed 32 people and injured 29 others in the infamous Virginia Tech shooting on April 16, 2007. He was a South Korean-born immigrant who studied at the university and had been known to suffer from mental issues. He committed suicide before the police could reach him.
Veronique Courjault is a French woman and murderer who killed three of her newborn babies. As it turned out, her husband didn't know about her pregnancies as she kept them a secret through a process called denial of pregnancy. In 2009, Veronique Courjault was found guilty of all three murders and was sentenced to eight years of imprisonment.