On the Season Premiere of "20/20," Friday, September 6 on ABC

Does Michael Wohlschlaeger have terrible luck or is there something much more at play surrounding the sudden death of his fifth wife Shirley Seitz? Seitz died in 2010 from a blunt force head injury. Yet the manner of death was undetermined. And that's not all: 33 years earlier, Wohlschlaeger's first wife Lynn died at the age of 25 after choking on a cough drop; and his third wife, Gloria Potts, now alleges that he tried to harm her during their marriage, which ended nearly two decades ago.

Convicted of arson after he burned down his own office, Wolschlaeger is a felon, but is he also a killer? Wolschlaeger has denied being responsible for Shirley's death and has told police that she must have accidentally fallen. He also was able to get the family's wrongful death suit dismissed, but Shirley Seitz's family still believes he harmed her - and they have reportedly now convinced the Alabama Attorney General to re-open an investigation into her death. With exclusive family interviews and Alabama Bureau of Investigation interrogation tapes, Jim Avila's report airs on the season premiere of "20/20," FRIDAY, SEPTEMBER 6 ( 10:00 - 11:00 pm ET) on the ABC TELEVISION NETWORK.

"20/20? is anchored by Elizabeth Vargas and David Muir. David Sloan is senior executive producer.

-ABC-