A 35-year-old Crystal Lake man accused of entering another man's home and stabbing him multiple times pleaded not guilty Friday to attempted murder and other charges. Michael A. Vrba, of the 300 block of Millard Avenue, entered the plea in court Friday morning beside his attorney, McHenry County Assistant Public Defender Angelo Mourelatos. On Wednesday, a McHenry County grand jury approved felony charges of attempted murder, home invasion, aggravated domestic battery, aggravated battery, and residential burglary, prosecutors said. Vrba was arrested Jan.