She was a prostitute who was killed by Brian Moser.
She is one of ten women who were named on the buckets of The Ice Truck Killer, making her one of fifteen known victims to the killer. Her name is revealed in "Born Free,' alongside the buckets for Tammy Goode, Jill Vartos, Teri Ludlow, Heather Costas, Alice Curry, Amy True, and Terry Foster. There are two unknown buckets, as well as a third bucket with blood still present (likely representing Monique). One of the two unknown buckets is Sheri Taylor, the third unfortunate victim shown in the show at the Miami Blades Ice Hockey Stadium during "Popping Cherry.'
When Guilda was killed and whether or not she is one of the other girls shown dead in the show is uncertain.