killed an m.i.t. police officer, we know that a shootout followed in which he was injured. we also know that his brother ran over him with a car. so the nature of the injuries would include, for example, gunshot wounds, also trauma, both to the body but also to the head as well. but again, waiting for the official version of the medical -- the certificate, anderson. >> you've been talking -- do we know why it hasn't been released? they said it was supposed to be released friday morning. >> reporter: well, no. we don't. we don't. we got full word yesterday that once the medical examiner released the body, which they did yesterday, and it was picked up by one funeral home, then taken to another funeral home, because there was some controversy over where it was going to be buried, but no indication as to why they didn't actually publicly release the cause of death as we thought they would. >> you have been talking to sources about the claim by dzhokhar tsarnaev they initially intended to attack on the fourth of july. what are you hearing? >> reporter: well, talking to intelligence sources, what we're learning is this.