A 51-year-old Des Plaines man was sentenced to more than 17 years in prison after pleading guilty in July to attempting to hire a hitman to kill his estranged wife and her friends. Zenon Grzegorczyk was arrested in 2012 and has been in custody ever since. He met with undercover officers on three occasions to set up the murders and was willing to pay up to $5,000 for each person killed, authorities said.