COSTELLO, John Edwin, ``Jumpin' Jack'', age 49, died ~ (park death) July 18, 1998. Survived by his loving parents John and Francine; brothers Chris and Joe; one niece and one nephew and wife Jackie. Jack worked for the Palos Hills Police Dept. and Hickory Hills Police Dept. in Illinois, before moving to Tucson 22 years ago. He was employed by the Arizona Dept. of Corrections and was ``Jumpin' Jack'' on KRQ Radio. He will be missed by family, friends, co-workers and KRQ listeners. A Memorial Service will be held at St. Pauls United Methodist Church, 8051 E. Broadway, August 6, 1998 at 7:00 p.m.