Free Collision Course by Franklin W. Dixon

it looks like he's moving a little."
    "Like he lost control before he hit the turn," Joe said. "And it seems like he's awfully low in the cockpit. You can barely see the top of his body. " 'Like he was unconscious and slumped over?" Frank suggested. The videotape kept rolling in slow motion, and they watched the race car push out the guardrail if it were sliding through a wall of butter.
    "I wish we had a better camera angle," Frank muttered.
    The car rolled slightly to one side as it fell toward the water. "Now you can't see him at all!" he complained.
    "Great shot of the axles, though," Joe tried to joke.
    As gruesome as it was, they replayed the seen several times, looking for anything they have missed. "Okay, Callie," Frank finally said. "You can shut it off. This isn't going to tell enough."
    "Looks like it's time to go diving," Joe said.
    "Looks that way," Frank agreed.
    They left the videocassette with Callie and headed home to pick up some equipment.
    "scuba gear's loaded in the back," Joe said as he climbed into the van's passenger seat.
    "Good," Frank replied. He was already behind the wheel, and the engine was running. "Let's get going." He backed the van out of the driveway and headed down the street.
    When they got to the end of the block, Frank turned left. "Hey, this isn't the way to the marina!" Joe protested. "Aren't we going to the boat?"
    Frank smiled. "I thought we'd take the route."
    Joe glanced at Frank and knew he wasn't going to get any more information out of him. So he passed his time reading the street signs and trying to second-guess his older brother.
    After a few minutes Joe said, "Frank, I think you just made a wrong turn. This road leads to — " "I know," Frank nodded. "You want to take a look at McCoy's car, and I want to take another look at the crash site." He turned the wheel Sharply and the van swerved onto an old dirt road.
    ' They bumped along the twin ruts for a couple of miles, until they came in sight of Barmet Bay. "I'd forgotten about this old access road," Joe said as he opened the back door of the van and started to take out the scuba gear.
    "Good thing I didn't," Frank said, hoisting a coil of thick rope. "With the highway blocked off for the race, we would have had a long walk."
    Frank crouched down to look at something. "What is it?" Joe asked.
    "It looks like someone else has been here recently," Frank replied, running his hand along the ground. "Footprints."
    Joe shrugged. "Probably somebody came up for the view. Come on. Let's get moving."
    The two brothers clambered down a steep incline to the paved road that skirted the cliff. They then followed the road around the hairpin turn. Joe stopped by a pair of wooden barriers with Hashing emergency lights bolted to them. They were blocking the ragged gash in the guardrail where McCoy had crashed.
    Frank kept walking all the way to the tunnel, scanning the roadway as he went. "Just as I thought!" he shouted. "There aren't any skid marks!" He trotted back to where Joe was standing. "Do you know what that means?"
    "Yeah," Joe nodded. "Either he didn't even-hit the brakes or nothing happened when he did. He just plowed over the edge without slowing down."
    "And that means it definitely wasn't an accident," Frank added, moving around the saw-horses.
    "You'd think someone like Arno or the police would have noticed that," Joe said.
    Frank shrugged. "They had already decided it was an accident. They weren't really looking for anything else."
    He motioned to Joe. "It looks like we can climb down most of the way without using the rope."
    "Then what?" Joe asked.
    "Then you put on the scuba gear and I lower you down into the water."
    "Why don't I lower you down?" Joe suggested hopefully, slinging the bulky air tank over his shoulder. He didn't care much for the idea of rappeling down the cliff in a wet suit with that thing on his back and flippers on his feet.
    "Because that's not part of my plan," Frank insisted. "If you don't like it, you