Free Blood Relations by Franklin W. Dixon

no evidence to convince the police to pursue the matter. The Lichtenstein corporation, the Bahamas checking account, and the numbered Swiss savings account had all ceased to exist already.
    Hearing the plan, Dunn had said, "That means we have to catch these people now. They're already dismantling the operation. Once they do, it'll be impossible to pin anything on them that'll stick."
    Frank nodded. "We have to get our hands on at least one of them. But we have to make sure we get Callie safely out of it first. Otherwise, she's dead. With a murder rap for his first wife hanging over his head, Rawley won't have anything to lose by ordering another."
    Dunn thought a moment. Then his face lit up. "I think I might know how we can pull it off."
    He'd go with Frank and Joe to the exchange. Greg and Mike were to stay with their mother to guard against any attempt to take her again. Dunn would wait in the center of the platform, taking Frank's place, since he was the least athletic of the three. When the crooks arrived with Callie, Dunn would hand them the microfilm. While they were checking it, Joe and Frank would come charging in, creating a diversion that would let Dunn pull his gun and grab Callie.
    "Of course, if it's clear they're on guard against a move like that, we won't try to pull it off," Dunn said.
    "Right," said Frank. "We can't put Callie in any more danger than she's already in."
    "If it looks like it won't come off, I'll drop my briefcase, as if by accident. That'll be your signal to hold back. They should just think I'm nervous."
    "One thing still puzzles me," said Frank, working at figuring out all the angles. "What was this Clark guy doing with the microfilm in the first place?"
    "Don't know. Maybe he was going to blackmail Rawley," said Dunn. "It wouldn't be the first time an employee tried to put the bite on his boss. Or he might have just found out about Rawley's secrets and been gathering evidence to turn him in to the authorities. Either way, Clark didn't figure how savage Rawley could be."
    "I can hardly wait to get my hands on these guys," Joe said. "Starting with the kidnappers and going right up to the top. I'll show them savage."
    But after a half hour of waiting in the dilapidated station, Joe was beginning to doubt that he and the others were going anywhere except back to Bayport empty-handed. He had virtually memorized the spray-painted graffiti that covered every inch of the grimy walls.
    It had been at least half an hour since the last train had arrived, virtually empty. It had made its brief stop without anyone getting off, then rumbled away.
    Now, in the distance, from far down the tracks, Joe heard the echoing rumble of another train approaching. He tensed. The kidnappers hadn't said how they'd arrive in this station, but after seeing how deserted the station was, Joe had a strong hunch they'd come by train. It would be the perfect way to get in and out fast.
    The rumbling grew louder, and Joe leaned forward, his attention fixed on Dunn. When the train arrived and the kidnappers made their move, Joe would have to move faster than they could.
    Then, abruptly, before the train made it to the station, the rumbling stopped.
    The train was experiencing what the New York Transit Authority like to call "a temporary delay."
    But if that was bad news for the passengers, it was good luck for Joe.
    If the train had kept rumbling along, he never would have heard the footsteps coming up behind him.
    He whirled around to face a man who stood with his arm upraised, about to bring a blackjack down on Joe's head. In that split second, Joe's brain registered that the man was dressed in a black jogging suit and black ski mask—just like the goons who had jumped him and Frank the night before.
    But there was no time for Joe to think about it. There was just time for him to react.
    His hand shot out and grabbed the attacker's wrist and gave it a sharp yank in the direction it was already moving. When the attacker was