Branigan - KahenLolita and Honald Kocsis of Richton Park have announced the engagement of their daughter, Deborah Branigan of Chicago, to Howard Kahen, son of Arlene and Eugene Kahen of Skoki.A 1976 graduate of Rich South high school. Miss Branigan received a bachelor s degree in psychology in 1980 from Rockford college and studied at Reid College of Detection of Deception She is employed as the chief polygraph examiner and criminal interrogator for Robert C Commins, Inc.Kahen. a 1975 graduate of Niles North high school, received a bachelor’s degree in chemistry in 1979 from the University of Illinois, Chicago He also received his medical degree from that university this year He will begin a residency training program at the University of Illinois hospital in July.The couple is planning a May wedding