[See also: How George Zimmerman Could Be Acquitted Of Murder]

On June 10, the murder trial of George Zimmerman will begin, 470 days after he shot and killed Trayvon Martin on a rainy evening in Sanford, Florida.

Since that night, Martin’s death has already had a profound impact on Sanford and the nation. But outcome of the trial, which is expected to last between four to eight weeks, is still uncertain. Since Zimmerman does not dispute that he killed Martin, the defense must establish that Zimmerman acted in self defense.

Here is the key evidence that could support a murder conviction.

1. Expert audio analysis. An audio expert says Trayvon Martin screamed “stop” and “I’m begging you” just before shot was fired. Alan Reich, an audio expert retained by the prosecution, says his analysis of 911 calls that night revealed that it was Martin, not Zimmerman, who was crying out for help prior to the shooting. Another expert, Thomas Owens, said he ruled out Zimmerman as the source of the screams. The defense has retained an expert from the United Kingdom who says the kind of analysis performed by the prosecution experts is not reliable.

If Reich’s testimony is admitted at trial and the jury finds it to be reliable, it would seem to undermine Zimmerman’s claim of self-defense. Its unclear if the testimony will ever reach the jury, however. The judge held a hearing on the admissibility of Reich’s analysis over three days but was unable to conclude it prior to the start of jury selection. The prosecution must show Reich’s “conclusions are based on methods ‘commonly accepted within their particular scientific or expert community‘ as reliable.” It will be completed next week.

2. Witness 8. A woman talking to Martin on the phone just before his death says Martin told her about a man following him and that he was scared. The woman, known as Witness 8, says “she heard Trayvon ask, ‘What are you following me for?’ and heard the man reply, ‘What are you doing around here?’” before the phone went dead. You can listen to a portion of her interviews with the prosecutor here.

The testimony signifiantly bolsters the prosecution’s contention that it was Zimmerman, not Martin, who was the aggressor. The defense is aggressively seeking to undermine her credibility, noting that she lied to prosecutors when she said “she was in the hospital on the day of Martin’s funeral.”

3. George Zimmerman’s credibility. During the bail hearing for George Zimmerman, his wife Shellie testified via phone about their finances. She testified that she had not assets when, in fact, they had transferred $74,000 raised online to an account controlled by her. She coordinated the transfers via jailhouse conversations she had with George, apparently in code. Shelly has been charged with perjury. Although George did not testify, he knew his wife was not telling the truth and allowed her to testify without alerting his attorney.

The prosecution has made a motion to compel Shellie to testify at a deposition and may seek to introduce evidence of the deception during the trial. The case rests in no small part on George Zimmerman’s credibility, as he was the only eyewitness to the entire incident.

To support the charge of 2nd Degree Murder the prosecution also must prove that Zimmerman acted with a “depraved mind” when he shot Martin. If the prosecution fails to prove that, the jury can consider a lesser charge of manslaughter.

[See also: How George Zimmerman Could Be Convicted Of Murder]

On June 10, the murder trial of George Zimmerman will begin, 470 days after he shot and killed Trayvon Martin on a rainy evening in Sanford, Florida.

Since that night, Martin’s death has already had a profound impact on Sanford and the nation. But the outcome of the trial, which is expected to last between four to eight weeks, is still uncertain. Since Zimmerman does not dispute that he killed Martin, the defense must establish that Zimmerman acted in self defense.

Here is the key evidence that could support an aquittal.

1. No true eyewitness other than Zimmerman. The most significant evidence supporting the defense’s case is that the only living eyewitness to the entire incident is George Zimmerman. Ultimately, the burden of proof is on the prosecution to prove that Zimmerman was not acting in self-defense. Zimmerman, of course, says that his head was being pounded on the concrete and he had to shoot Trayvon Martin to save his own life. The prosecution will have to completely discredit Zimmerman’s version of the events without any eyewitness testimony supporting their petition.

Zimmerman may not testify during the trial. He has given several statements to the police which could be admitted as evidence.

2. A bloody nose. Photos of Zimmerman taken immediately after the shooting show he was injured — primarily a bloody nose and other lacerations to the head — during his altercation with Martin. Although this does not establish who was the aggressor, it is consistent with Zimmerman’s version of the events.

Police “challenged him about the injuries, saying they were not severe and nowhere near life-threatening.”

3. Witness 6. A neighbor of Zimmerman says that, at one point, “he saw Trayvon on top, beating or pushing down on Zimmerman ‘MMA-style.’”

Witness 6′s account of the event, however, is far from definitive. He initially claimed that Zimmerman was screaming prior to the gun shot, but later recanted.

To support the charge of 2nd Degree Murder the prosecution also must prove that Zimmerman acted with a “depraved mind” when he shot Martin. If the prosecution fails to prove that, the jury can consider a lesser charge of manslaughter.

A Florida judge ruled Tuesday that George Zimmerman will not able to use 17-year-old Trayvon Martin’s school records, texts, and prior marijuana use in court for the second-degree murder trial for killing the teen last year, which begins June 10.

The case became notorious for Zimmerman’s claim he was protected from trial under Florida’s ALEC-modeled Stand Your Ground law. Since then, Zimmerman has dropped his Stand Your Ground defense, but he will still argue he acted in self defense when he shot the unarmed teen on the street of a gated community. The two sides appeared in court Tuesday to present a number of motions, including what evidence is admissible in court and a failed motion to delay the trial.

But before the hearing today, Zimmerman’s lawyer released images and texts that attempt to cloud Martin’s public image.

On air last week, Mike O’Mara touted the new images he said portray a more “three-dimensional picture of Trayvon.” According to Mediaite, Fox broadcast images from Martin’s phone that showed a hand holding a gun and a photograph of marijuana, which O’Mara argues is central to his client’s argument that he acted in self-defense because it shows Martin was “street-wise.”

The judge has decided that none of this information will be permitted in court. However, Zimmerman’s defense may still hope the campaign has implications for the trial and for potential jurors.

Benjamin Crump, the attorney for Martin’s family, explained in a statement Thursday:

Is the defense trying to prove Trayvon deserved to be killed by George Zimmerman because (of) the way he looked? If so, this stereotypical and closed-minded thinking is the same mindset that caused George Zimmerman to get out of his car and pursue Trayvon, an unarmed kid who he didn’t know. The pretrial release of these irrelevant red herrings is a desperate and pathetic attempt by the defense to pollute and sway the jury pool.

In the Orlando Sentinel, state prosecutors said the information is “irrelevant… and would serve only to prejudice the jury.”

It’s been nearly a year since George Zimmerman shot and killed Trayvon Martin, an unarmed 17-year-old on his way back to his father’s townhouse. In the weeks following the shooting, the story captured the nation’s attention, culminating with Zimmerman being charged with second-degree murder last April.

But as the story has receded from the headlines, the legal case has plodded along and the trial is likely to be completed this summer. Here’s what you may have missed:

1. Zimmerman has spent over $300,000 in donations over the last year and is desperate for more funds to finance his defense. Zimmerman has “spent more than $125,000″ on living expenses — not including security — over the last year. His lawyer acknowledged that “Zimmerman’s personal spending may seem exorbitant.” Zimmerman is considering asking the court to declare him “indigent, meaning the public would have to pay for Zimmerman’s defense.” Zimmerman was also sued by a security company for unpaid bills. [Orlando Sentinel, 1/20/2013; Miami Herald, 12/27/12]

2. The trial has been set for June 10. Zimmerman recently asked for a delay of the trial until November but a judge denied his request. Zimmerman’s lawyer says it is “physically impossible for us to be prepared” for trial at that time. A separate proceeding, essentially a mini-trial, to determine whether Zimmerman is immune from prosecution due to Florida’s “Stand Your Ground” law, is scheduled for April 22. [Orlando Sentinel, 2/5/13; Headline News, 2/13/13]

3. New forensic analysis “casts doubt on Zimmerman’s timeline on the night he shot and killed the unarmed teen.” The analysis was done by “Michael Knox, a retired Jacksonville Sheriff’s Office detective and crime scene investigator.” According to Knox, “based on the times and distances Zimmerman said he covered, Zimmerman would have still been on the phone with Sanford police when he claims he was attacked by Martin.” Knox says that other aspects of Zimmerman’s story, like the claim Martin was leaning over him at the time the shot was fired, are supported by forensic evidence. [News 4 Jacksonville, 2/10/13]

4. Zimmerman has gained 105 pounds. [Orlando Sentinel, 1/20/2013]

Zimmerman in February 2013. AP Images.

5. The defense team acquired Trayvon Martin’s school records. According to Zimmerman’s lawyers “some information in Trayvon Martin’s file could be relevant in the defense of George Zimmerman.” State prosecutors and the Martin family attorney opposed Zimmerman’s efforts to acquire the records arguing “because Zimmerman did not know Trayvon before the Feb. 26 shooting, the teen’s past was not a factor in the case.” [Orlando Sentinel, 1/16/13]

6. Zimmerman is suing NBC News. In the suit, Zimmerman claims NBC unfairly portrayed him as a “racist and predatory villain.” [ABC News, 12/6/12]

7. The judged denied Zimmerman’s request to be removed from GPS tracking. [Fox Orlando, 12/11/12]

8. Trayvon Martin would have turned 18 on February 5. [Huffington Post, 2/5/13]