he told investigators this very same thing, at his bedside, while they were interrogating him. whether he thought he was going to die and he wanted to make sure he got his message out, we're left to wonder that. >> so he wrote this after the attack, clearly based on what we've heard and what you reported about what he felt. he didn't feel any remorse. could this impact the case against him that law enforcement authorities are now building? >> reporter: it's certainly a question that's being asked and debated. he willingly, according to our sources, told the investigators a lot of things. for example, that the bomb was made right there in his older brother's apartment, and that they tried it out and found bomb residue to match up with what he said. the question is, by apparently showing little feeling for the victims in this case, we talked to our cnn lead analyst to get a feel from him, jeffrey toobin, about what could happen as his defense attorneys try to move