dr. duncan said. how long do they believe this beautiful lady had been dead, her son missing, and why do they believe the husband has headed to mexico? >> they believe that she was murdered either tuesday night or wednesday morning. it is very possible that she was murdered by her husband while their three children were in their home. that's a distinct possibility. they believe that he's in mexico because he has family there. both his parents and a brother in mexico. >> very quickly, lauren, we only have a couple seconds. but say these children are extremely young. would they remember the murder if they were in the home? >> they would not remember it concretely. they would remember it in a dream state but their abstract reasoning is not developed so it would not have the force of a trauma of a real memory blocked or otherwise. >> this child gone. let's stop and remember army staff sergeant. 28. killed in iraq. a soldier's soldier. a smile that lit up a room. lost his life after a surprise visit home f

dr. titus duncan. atlanta medical center. dr. duncan, thanks for being with us. you tell how long the mother had been dead? what i'm getting at is, how much of a head start did the perpetrator get with the little boy? >> several ways you can tell how long the body's been deceased. first thing you look for is the temperature. the temperature and the color of the body. after that the rig more to us that sets in. and the first thing like i said is the temperature of the body. the body decreases in temperature by one degree per hour. and so, you can kind of get an idea as to how long that person has been dead within several hours if you find the person fairly early, until they get to the point where they reach the temperature of the surroundings. >> doctor, would there be insects if the body were indoors? >> absolutely. there would be insects inside. >> what insect? >> you get the larva. basically, the little small insect that comes from the material itself? you mean a maggot. >> right. you have to break it down from our lawyers, doctor. we're just j.d.s not m.d.s li

duncan will be in chicago to discuss school violence. this comes after the beating death of a 16-year-old honor student, derrion albert. dr. steve perry says the public should be more outraged. >> when the child doesn't see a future they have to connect to that with which is now. when a child cannot make it home from school in their school uniform, i am amazed we are not more enraged. if this had been a white police officer that split the kid's head open blood would run through the streets. because it was a young brother killed by another young brother, we are just sad. that's not enough. when you have an area where we have children failing as a sthan dard, we can only expect that the grown people are not handling their business. >> four suspects are facing first-degree murder in his death. >>> hundreds of documents released this week in the caylee anthony case in florida. why are defense lawyers demanding prosecutors drop the murder charge against her mother, casey anthony? >>> here at the bar and grill. i come out here because everybody knows my name. they have good newsic. bartenders are cool. the food is absolutely fan