Keith Michael Costigan, of Plainview, died on May 8, 1998. Son of Kathleen and Victor. Brother of Coleen and Wayne. Grandson of Katherine Hanely. Arrangements were made by the Arthur F. White Funeral Home, Bethpage. Funeral Mass at St. Pius X RC Church. Interment St. Margaret's Cemetery. Donations can be made to the Cystic Fibrosis Foundation, Keith Costigan Memorial Fund, 420 Jericho Tpke., Jericho, NY 11753.