SGT David Leroy Judy was born December 18, 1949, and was 20 years old when he died in Tay Ninh Province on February 2, 1970.  You can find him on Panel 14W, Line 94.  You can find remembrances of him at https://www.vvmf.org/Wall-of-Faces/27002/DAVID-L-JUDY/.