Biography: Daniel Michael Sheehan, age 67, of Little Rock, died Thursday, May 3, 2012. He was born in Boston, Massachusetts on September 5, 1944 to the late Frank and Betty Sheehan. He is preceded in death by his brother, Thomas Sheehan. Daniel received his Undergraduate and Master?s degree at the University of South Florida at Tampa, his Doctorate at the University of Tennessee at Oak Ridge and his Post Doctorate Fellow at Baylor University at Houston. He was a retired Biochemist for the US Food and Drug Administration at the National Center for Toxicological Research in Jefferson, AR. Daniel is survived by his wife, Susan Laney-Sheehan; children, Catherine Johnson and Anne Weaver both of Little Rock; step-children, Holly Patton of Austin, TX and Laney Briggs of Little Rock; grandchildren, Olivia Weaver, Mary Claire Briggs and Andrew, William and Benjamin Patton; sisters, Lani LeFevre of Bath, NC and Patty Sheehan of Jacksonville, FL and sister-in-law, Joyce Sheehan Thornburg of Ashville, NC. A memorial gathering will be held at Ruebel Funeral Home, 6313 W. Markham St on Saturday, May 5, 2012 from 6 to 8 p.m. In lieu of flowers memorials may be made to the Alzheimer?s Association, www.alz.org. Arrangements by Ruebel Funeral Home, www.ruebelfuneralhome.com.