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This won't make an already complicated story any simpler: Four eyewitnesses to George Zimmerman's shooting of Trayvon Martin have backed away from, or completely changed what they said earlier.

"Three changed their stories in ways that may damage Zimmerman," according to The Orlando Sentinel's Rene Stutzman and Jeff Weiner. "A fourth abandoned her initial story, that she saw one person chasing another. Now, she says, she saw a single figure running."

The changing witness accounts are part of a bundle of evidence that the prosecution team released last week. Here's how the four witnesses accounts changed, per Stutzman and Weiner:

Witness 2 first said she saw two figures running about 10 feet apart and saw a fistfight. In her second interview she said: "I couldn't tell you if it was a man, a woman, a kid, black or white. I couldn't tell you because it was dark and because I didn't have my contacts on or glasses. … I just know I saw a person out there."

Witness 12 first said she saw two people on the ground and wasn't sure who was on top. She changed that in her second interview, saying that "Zimmerman was definitely on top because of his size."