A CD thief?

“How would anyone get out of here with stolen CDs?” Eric asked. “They’ve got a security gate that beeps.”

“That’s a mystery,” Cam said. “How did someone steal the CDs and get them past the exit gate?”

Eric clapped his hands and said, “I knew it! I just knew it! Wherever we go, you find a mystery.”

Cam picked up a CD. It was in a closed plastic case. Stuck to the inside of the case was a white rectangle.

Cam showed Eric the white rectangle and said, “Here’s the magnetic strip. It sets off the alarm when you leave the store.”

Cam thought for a moment. Then she whispered, “Maybe a thief broke open the cases, took off the white rectangles, and stuffed the CDs in his shirt.”

“Maybe,” Eric said.

“I’ll look for the broken cases,” Cam told him.

Eric said, “I’ll check the registers.”

Near the back of the store Cam felt a draft of cold air. She turned and saw that the back door was open. And there was no security gate there.

Cam was just starting toward it when she heard a loud “Beep . . . Beep . . . Beep” coming from the front of the store.