Marko Guardiola, 37, is charged with first-degree murder. A 15-year-old is also charged with murder in the death last week of 52-year-old Jean Wattecamps. He was found stabbed to death Thursday in his apartment in Mount Prospect.
Police say the older suspect, Marko Guardiola, is homeless. The juvenile suspect is charged as an adult.
There's no word on a motive.