The Biggest Legal Stories of 2015

A look back on the year in courtroom drama and a peek at what to expect in upcoming legal cases for 2016.
5:23 | 01/01/16

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Transcript for The Biggest Legal Stories of 2015
Ben stiller bringing it back famous blue steel back to big screen. We have a look at that, plus all of the best bets for the box office for the coming year. Very exciting stuff. "Good morning America." Very happy new year to each and every one of you. We're actually on tape this morning, so we're not here, we're spending time with our families and hope you're doing the same this morning. Coming up, let 2016 be your year to travel. Amen. We'll help you plan the ultimate getaways. Now, a look at the biggest legal stories of the past year, cases with national significance gripping the country and stunning twist the whole country have been watching. ABC's Dan Abrams. Reporter: 2015 brought us some several landmark rulings. From supreme court. Same sex marriage must be protected in 2016. Italy finally resolved the case of Amanda Knox, convicted of murder in 2007 for the slaying of roommate Meredith Kutcher. Overturned and convicted three times until the Italy's highest court decided once and for all to throw out the convictions. One high-profile case that wasn't resolved this year, bill Cosby, now accused by more than 50 women by drugging or sexually assaulting them. I have been sorry for 38 years and now it's time for him to be sorry. Mr. Cosby, how do you responded to the charges. Reporter: And just this week, Cosby charged criminally with sexual assault stemming from the Andrea constand case. Constand a former temple university employee. Alleged that the comedian drugged and sexually assaulted her. This is a felony of the first degree. Reporter: Through his attorneys Cosby has repeatedly denied all allegations. At least five civil lawsuits will also likely work their way through the courts in 2016, including a counter suit field by Cosby against seven accusers. Meanwhile in South Africa, an appeals court upped the ante for Oscar Pistorius, changing his manslaughter conviction to murder. Which could mean more prison time for Pistorius. 2015 was also the year of the police video and often times that meant officers on trial in the court of law or at least the court of public opinion. Officer Jason van dyke charged with first degree murder in Chicago. In Baltimore, six officers were charged after Freddie gray died in the back of police van when they allegedly failed to strap him or heed his request for help. The findings are thorough of an independent investigation that Mr. Gray's death was a homicide. Reporter: All of the officers have pled not guilty and these and other cases have the potential to set precedent for law enforcement throughout the country and will definitely be trials to watch in 2016. Dan Abrams is with us now to look ahead to the big legal stories in 2016. Let's begin in Baltimore where five more police officers have to face trial. You may see prosecutors trying to get these officers to turn, basically, even if they don't agree to turn to effectively to testify against the fellow officers, because, remember, the heart of this case, why this case is different from other police cases, here you don't have an officer shooting somebody else, you got officers accused, a majority of them doing nothing to help, knowing there was a help, helping to create the problem and then doing nothing. This makes this a little bit different. Very important case. Then Robert durst, he's expected to go on trial later this years for the murder of his friend dating back to 2000. It's going to be a show stopper. Anybody who saw the HBO show, this is a slam dunk, of course Robert durst is going to get convicted. He killed them all? Yes basically, he confesses to it. Yeah, they have a strong case against Robert durst. Yeah, they've got a pretty good shot of getting a conviction, but this is an old case. It's not easy to prosecute a case this old. They have more evidence than ever had before, they have a better shot than they ever had before. But this defense team has stuff to work with here. Also looking at Oscar Pistorius. Yes, because it's murder conviction, new sentencing coming up.

This transcript has been automatically generated and may not be 100% accurate.

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