Keith H. Arsenault, of Randolph, formerly of Hyde Park, passed away unexpectedly on Sunday, May 22. He was a retired MBTA employee, a former member of Union Local 589 and a late member of the Alliance. The beloved husband of 45 years of Lillian Ann (Leavey) Mr. Arsenault was the loving father of Emily M. Frechette & her husband Mark, Leanne C. Joyce & her husband Francis, all of Bridgewater and Stephen A. & David K. Arsenault, both of Randolph, the devoted Papa of Melena, Sean, Gabriella & Ryan Joyce and Patrick, Stephen, Mark & Christopher Frechette and dear brother of Edward J. Arsenault of Raymond, NH, Denise Molloy & her husband Francis of Franklin and Deborah Gangemi & her husband Paul of Norton. A Funeral Mass will be celebrated at St. Michael Church, Avon, Friday at 12 Noon. Visiting hours at the Alfred D. Thomas Funeral Home, 326 Granite Ave., Milton, Thurs. 4 to 8 PM. Interment in Fairview Cemetery, Hyde Park.