Questioned Again After Silence

A man was arrested for two robberies. After being warned of his rights, he said he did not want to answer questions about them, and the detective stopped at once. Over two hours later, a different detective took him from his cell to ask about an unrelated fatal shooting during a hold-up. He got fresh warnings. Told that an accomplice had named him as the shooter, he made statements implicating himself. He says police should never have questioned him again after he chose silence.