SECRET WITNESS REVEALS SCOTT AND LACI'S FURIOUS FIGHT HOURS BEFORE HER MURDER

On the night police say Laci Peterson was murdered, an enraged Scott Peterson ranted and raved at Laci as she tried to make airline reservations on the phone--and there was a witness to the argument, The ENQUIRER has learned exclusively.

"He scared me. He was in a rage," the airline clerk who handled Laci's call told The ENQUIRER. "I think he killed her just hours after I talked to her."

The issue that goes on sale Friday reveals all the details of the final furious fight, discloses the bizarre move Scott ultimately made in booking his flight...and more.