Does a conviction for aiding and abetting kidnapping resulting in death require proof of intent or advance knowledge of death?

QUESTIONS PRESENTED 1. Does a conviction for aiding and abetting kidnapping resulting in death, in violation of 18 U.S.C. §§ 1201(a)(1) and 2, require proof that the aider and abettor intended, or had some advance knowledge, a death would result from the kidnapping? 2. Does a suspect, during a custodial interrogation, sufficiently invoke his Fifth Amendment right to remain silent when he repeatedly asks to leave and “go home”? i