в злонамеренных целях(Back in the 1990s, a conspiracy theory emerged suggesting that the vapor trails of high-altitude aircraft that can often be seen criss-crossing the sky are actually trails of chemicals being deliberately sprayed by the government for shadowy, nefarious purposes. (unexplained-mysteries.com)
• Автор не несёт никакой ответственности за использование конкретных приведённых материалов в злонамеренных целях. (из рус. источников)ART Vancouver)
злоумышленник(The group concluded that a nefarious individual must have somehow stolen the bird from his home and, as such, indicated that they have alerted police to the suspected heist. -- некий злоумышленник (coasttocoastam.com)ART Vancouver)
преступник(What happened to Susan Adams? How did she just wander away so close to camp and then evaporate to never be found? Was she attacked by an animal or a nefarious party?mysteriousuniverse.orgART Vancouver)