Horace Riley was the heir and CEO to the Riley Mining company, and a murder victim.
Horace Riley was apparently friends with Ian Chase, but the friendship turned to enmity on the latter's end when Riley ended up becoming the fiancée of a socialite and activist, Clarissa Rodriguez. Riley was apparently friends with Bruce Wayne as well. Some time later, Riley, alongside Rodriguez, ended up murdered by Chase near Crime Alley, coincidentally at the same spot where Bruce's Parents were murdered. Batman, the alias of Bruce Wayne, uncovered the murder from a police report, and, he after uncovered Chase's role in the murder, had him apprehended after he nearly avoided choking him to death in anger for their deaths.