The canal in Baghdad where the murders took place.

Eliza Browning
AC360° Associate Producer

Tonight we’ll have the final part of our special investigation into a 2007 execution in Baghdad. Three decorated U.S. Army sergeants shot and killed four Iraqi detainees their platoon had taken into custody earlier that day. The soldiers are now serving prison terms at Fort Leavenworth. During interrogations, the soldiers blamed military policy for making it too hard to detain suspected insurgents.

So what really drove these sergeants to executive four Iraqi detainees? Tonight we’ll examine what the soldiers say is a “flawed” Army policy. It turns out the rules and requirements for taking in and holding detainees appears to be very strict. Soldiers must present detailed evidence, including accounts from two local witnesses to the crime. We obtained a memo that spells out the rules that were in place at the time of the murders. Of the 87,000 Iraqis detained since the war began, nearly 77,000 have been released due to lack of evidence. We interview a Brigadier General who oversees detainee operations in Iraq and we’ll ask him what he thinks of the policy. Don’t miss the final part of Abbie Boudreau’s special investigation tonight.

In a sign of how badly Democrats want to get health care reform passed, the Senate is now expected to work through the weekend and even into Thanksgiving week, shortening their customary week-long holiday break. The Republicans have the right to read the 2,074-page bill, which could take between 48 and 50 hours. Not my idea of weekend entertainment. But can we expect debate to heat up today? We’ll have the latest developments on the health care bill tonight.

We also learned last night that the American College of Obstetricians and Gynecologists is now advising women to have their first cervical cancer screening at age 21 and they can be re-screened less frequently than previously recommended. Should women really wait this long and what are the reasons for the new guidelines? The announcement, on the heels of the new recommendations for mammography screenings, are sparking outrage and confusion among women around the country. What do you think?

Gary Tuchman is in the Bronx tonight where a 15-year-old girl was shot in the head as she walked home from school earlier this week. She is in stable condition but has a critical head injury. New York City police arrested five people ranging in age from 16 to 23. They face charges including attempted murder and assault. Many believe the shooting ay have been gang-related. Gary Tuchman will report on the case tonight.

And on her show this afternoon, Oprah Winfrey will announce that she will end her talk show in September 2011. We’ll be following what she has to say and the legacy she created during her 25 years on air.

What else are you following? Let us know and see you at 10 p.m. ET.