Sean Patrick O'Brien age 37, life was suddenly and tragically ended by a car accident September 22, 2013.  Survived by his beloved wife and soul mate  Lisa ( Weiland) O'Brien.  Beloved oldest son of John and Linda O'Brien.  Loving brother of Erin (Brent) Eggleston, Moreen (Jacob) Lusk and Kevin "Shorty" O'Brien.  Adored uncle of Isabelle and Matthew Eggleston, Ethan Lusk and Brandon and Jeremy Flores.  Dear son in law of Pam (and the late Steven) Weiland.  Fond brother in law of Karyn Weiland Flores.  Loved nephew of Richard and Colleen Atwood and Greg and Mary O'Brien.  Sean was very close to his family, extended family, and friends.   He received his double Bachelor's degree from  Illinois State University.  His master's degree in Political Science from University of Illinois and then he went on to receive his Juris Doctorate from the University of Dayton law school.  Shortly after law school Sean began a career working at the Illinois Department of Criminal Justice Information Authority where he is well respected amongst his peers.  One of his main contributions was developing an organizational model of their system in which many states throughout the country have implemented.    Visitation Friday at Cooney Funeral Home 625 Busse Hwy Park Ridge from 4-8 p.m. with a funeral service at 6:30 p.m.  Sean will be laid to rest on Monday Sept. 30 in Springfield, IL.  Visitation will be from9 a.m. to 10 a.m.  at the Cathedral of the Immaculate Conception (524 E. Lawrence).  Funeral mass at 10 a.m. Interment Edinburg Cemetery in Christian County, IL.