From the New World Encyclopedia:
Benjamin Lucius Riley (November 1, 1986 - ) The available primary sources disagree on the details of the early career and birthplace of Benjamin L. Riley. Journal entries written by survivor Algernon Blackwood establish that Riley, like Blackwood himself, was a former reporter; first-hand interviews with former military survivors tends to indicate that Riley had been a private in he U.S. Army, while former doctors and nurses often claim that Riley had trained as a paramedic, and career criminals are confident that he been incarcerated for petty theft. At present it seems most likely that Riley never told anyone what his real occupation had been, prior to the Troubles, and that various members of his crew had simply assumed that he had done certain jobs based on his possession of the appropriate job skills.
The only facts which are now certain are that Ben Riley arrived in the town of Piety, Indiana on the morning of October 16th, 20--, with an express intention of saving its surviving human population from a breaking Wave of dead marching from the former city of Indianapolis. In the course of 14 eventful days, Riley was able to seize control of an abandoned building, recruit a group of stalwart human resisters, build barricades and traps, and supply food and water at one of the first known "Fort Zombie" sanctuaries to stand against such a Wave.
Sources agree that Riley had no surviving family of his own. The present wherabouts of this early resistance leader are unknown.