SAN JOSE, Calif. — Patrick K. Tillman stood outside his law office here, staring intently at a yellow house across the street, just over 70 yards away. That, he recalled, is how far away his eldest son, Pat, who gave up a successful N.F.L. career to become an Army Ranger, was standing from his fellow Rangers when they shot him dead in Afghanistan almost two years ago.
"I could hit that house with a rock," Mr. Tillman said. "You can see every last detail on that place, everything, and you're telling me they couldn't see Pat?"
