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KNOW IT ALL: Wednesday's Top 6 Stories at NBC News

From the start of the so-called "American Sniper" trial to the death of American ISIS hostage Kayla Mueller, see the stories we're following.

Good morning. Here are some of the stories we’re following today:

1. ‘American Sniper’ trial starts: What you should know

The small town of Stephenville, Texas, will be the center of the so-called "American Sniper" trial when opening statements begin Wednesday. The 12 members of the jury must decide whether Eddie Ray Routh, 27, committed capital murder or is not guilty by reason of insanity in the killing two years ago of ex-Marine Chris Kyle and his friend Chad Littlefield, an Iraq veteran. Kyle is the subject of the box-office smash and Oscar-nominated movie "American Sniper." Read more in NEWS.

2. Family of three slain near UNC campus

Police have arrested a suspect in the Tuesday shooting of a second-year dentistry student, the man's wife and her sister in an apartment complex near the University of North Carolina at Chapel Hill. Craig Stephen Hicks, 46, has been charged in the triple murder, but police did not immediately release any possible motive for the crime. Deah Barakat, 23, his wife Yusor Mohammad, 21, and her sister, Razan Mohammad, 19, were found dead at the scene by officers who responded to reports of gunfire just after 5 p.m. The Charlotte Observer reported that all three victims were Muslim. Read more in NEWS.

3. ‘A better world’: Slain ISIS hostage remembered

The family of Arizona native and aid worker Kayla Mueller confirmed Tuesday that they had received photographic evidence of her death from ISIS. The terror network had claimed Mueller, 26, died in a coalition airstrike last week, although U.S. officials say her injuries aren't consistent with an airstrike attack. Friends and family said at a news conference that they want Mueller's death to prompt something she had tried to accomplish in her short life: put a spotlight on the suffering of Syrian refugees. "The things that were important to Kayla are finally getting the attention they deserve," her aunt, Lori Lyon, said at a news conference. Read more in NEWS.

4. Fighting rages in eastern Ukraine ahead of peace talks

Russia's Vladimir Putin and Ukraine's Petro Poroshenko are scheduled to meet Wednesday to discuss a cease-fire in the war-torn region of Donetsk. Fighting between the pro-Russian separatists and the Ukrainian troops has been unrelenting. A shelling rocked a bus station in Donetsk on Wednesday, and an Associated Press reporter saw one body and was told by rebel officials that another body had been recently removed from the scene. Donetsk city officials said in a statement that three people had been killed overnight. Read more in NEWS.

5. Suspect surrenders in shooting of San Diego TV anchor

Police arrested a man Tuesday who is believed to have shot a San Diego TV anchor and sports director, peppering his car before driving off. The suspect, Mike Montana, was captured after police surrounded his home. CBS affiliate KFMB reported Tuesday night that Kyle Kraska, a sports director and anchor at the station, was out of surgery and that his prognosis was good. A motive wasn't immediately clear. Read more in NEWS.

6. Jon Stewart leaving ‘The Daily Show’ by end of year

The funnyman announced Tuesday that he'll be ending his 16-year stint on the show by the end of the year, delivering the news during a taping of his show. "It's been an absolute privilege," said Stewart, 52. "It's been the honor of my professional life, and I thank you for watching it, for hate-watching it, whatever reason you are tuning in for." The network said "The Daily Show" will continue, but a replacement has yet to be announced. Read more at TODAY.