"Clarissa--that's kind of weird--black turning into yellow," one student says.
As they compare their samples with the ransom note, Xiomara throws her head back and groans. Her ink has separated, and yellow has bled out. The ink from the ransom note also gives off yellow.
"You're guilty!" a girl in Xiomara's group says to the groaning suspect.
"How do you know?" Bonanno asks.
The room fills with several voices explaining it, first to Bonanno and then to each other.
As their journals are passed out and the students write down what happened, Bonanno is grinning.
Xiomara is laughing. "I still want my 50 bucks!" she says.