ORLANDO, Fla. – Modern DNA testing and forensic reanalysis have cast new doubt on the evidence used to convict Tommy Zeigler in 1976 of four murders that occurred on Christmas Eve 1975, his attorneys said, a development they contend could provide a chance at freedom for the now-80-year-old inmate if the results are deemed authentic and legally relevant.

Zeigler was convicted of killing his wife, his in-laws and another man at his family’s furniture store in Winter Garden. According to Ziegler’s attorneys, prosecutors relied heavily on forensic assertions that bloodstains on Zeigler’s clothing came from his family members and on a theory that he fired the shots at close range.

[WATCH: Tommy Zeigler granted hearing on DNA evidence]

Zeigler has long maintained he was a victim — saying h

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