John Gordon Postweiler, age 70 of Palos Park, passed away on June 2, 2017. He was the beloved husband of Margaret (nee Behrens) for 36 years and the loving father of Gregory G. (Catherine) Postweiler. He was the cherished brother of Joyce (Charles) Duesing and fond brother-in-law of Nancy Roko. He was the devoted and loving uncle of Blain Duesing, Chaney Roko, Ellyde (Darnell) Thompson, Jonathan (Sophal) Roko, and the late Jasmine Roko as well as great-uncle to nieces and a nephew. John was preceded in death by his parents Gordon and Dorothy Postweiler, formerly of Blue Island. A dedicated attorney, John was a loyal friend, willing confidant, and sage counselor.