04/25/2009 at 02:00 PM EDT
The August 14 dream wedding on the Jersey shore between accused Craigslist killer
Philip Markoff and his fiancée Megan McAllister has been called off for now, according to the leader of their wedding band.
"A family member of Megan's told me there is no possibility of this wedding taking place this August," William Forte, founder and keyboardist for the B-Street band, tells PEOPLE exclusively.
Jim McAllister, father of the bride-to-be, told PEOPLE at the family's Little Silver, N.J. home: "We know nothing right now, no comment." Markoff's parents have not returned calls for comment.
Forte describes the family member he spoke to as "distraught and in shock," and says the person called him in the last 24 hours.
In preparing to play at the wedding, Forte met with Megan, 25, but not Markoff. "She was very nice, bubbly," he says, "very personable." Previously, Megan has described her fiance as a "beautiful man inside and out." Markoff is accused of killing aspiring model Julissa Brisman, 26
The B-Street Band is a Bruce Springsteen tribute band. McAllister's Facebook page says she is a fan of Springsteen, who has a home in Rumson, N.J., which is near McAllister's hometown.
Forte says he is dissolving the contract he has with McAllister's family. At the request of a family member, Forte took down a statement he had posted on the band's Web site saying that the wedding was not going to take place. Says Forte: "I feel terrible for the families."