Murder Unlimited debuted as “Bid for a Railroad” in Nick Carter Magazine (January 1934). It was the second (of four) Nick Carter stories (originally written by Richard Wormser) to be bound and offered in digest-paperback format by the publishers Vital Publications in 1945.
Here, Nick is contracted to stop a competing railway line from putting a small-town line out of business. The owner is certain that they are using criminal means. Nick quickly learns that the railroad detectives assigned prior to the case, and still employed, are actually all corrupt and have criminal records of their own.
The son of the head villain (whom we never actually get to meet) goes so far as to deposit an extravagant amount of cash into the local bank (owned by the locals) and shortly thereafter, it is robbed at gunpoint.
Realizing that the bank doesn’t have enough funds to repay the villain’s son, nor the farmers and local homesteaders, if and when a run on the bank does develop (which turns out to be opening bell the next morning), Nick must chase the thieves, obtain the lost funds, return those funds in time to the bank before it opens, and coerce the largest depositors from extracting their funds, thereby tricking the locals to retain faith in the bank. It’s a nasty business but Nick is up to the transaction.
The head railroad detective is captured and after some trickery on Nick’s part, he agrees to turn evidence over against the villain’s son. Plus, the detective’s two assistants were murdered by the son, so he realizes his life is forfeit, otherwise. A local farmer-investor, duped into the dealings, confesses all, too. The local sheriff takes the son and the detective to jail….