Catherine M. Dillon (née Lanigan), age 86, passed away peacefully on July 29, 2018. Beloved wife of James J. Dillon; loving mother of James J. Jr. and Deborah Dillon; devoted daughter of the late Thomas and Margaret (née Harte) Lanigan; dear sister of John (Patricia), Patrick (Marilyn), the late Thomas (Dolores Lanigan-Kane), Myles (Carolyn) Lanigan, and Margaret (the late Dan) Delis; fond sister-in-law of Diane (the late Clarence) Low; kind aunt of many nieces and nephews. Catherine worked as an office manager for Standard Publishing Company for over 20 years before becoming a partner and office manager for the James J. Dillon Private Detective Agency from 1985-2013. Visitation Wednesday, 3:00 – 8:00 p.m. Funeral Thursday, 9:15 a.m. from Thornridge Funeral Home (Janusz Family Funeral Service) 14318 S. LaGrange Rd. (Northbound traffic: U-turn permitted at 143rdSt.),Orland Park to St. Francis of Assisi Church Mass 10:00 a.m. Interment Holy Sepulchre Cemetery. In lieu of flowers, memorials directed to the Alzheimer's Association are appreciated.