A 28-year-old Chester County man was sentenced Thursday to 171/2 to 41 years for killing his mother during a psychotic rampage in January 2010 at the home they shared in Lower Oxford Township.

Chester County Court Judge Anthony A. Sarcione imposed the sentence on Ian Matthew Driscoll, who pleaded guilty but mentally ill in September to third-degree murder and possessing an instrument of crime: the screwdriver used in the fatal attack against Lisa M. Driscoll, 49. - Kathleen Brady Shea