He turns it over and over again in his hands. "I am thinking something. The mark in her arm -- the pinprick. She realizes she is going into shock. She is a doctor -- she knows what to do. She injects herself with the epinephrine, verdad?" He pantomimes with the syringe.

"So," you say. "The pinprick is NOT a blowgun dart -- it is her giving herself the epinephrine."

"Asi es," Jorge says. He hands you back the syringe. "But then what gave her the allergic reaction?"

What do you tell Jorge?

• -- An attack by a vampire bat.
• -- The lamb and rice dinner.
• -- Pills from the medicine bottle.
• -- A bite from the kissing bug.
• -- A poison-tipped blowgun dart.
• -- The goatsucker.
• -- I don't know.