Family and friends of Lori Hacking (search) gathered Saturday for a memorial service to remember the woman whom authorities believe was slain by her husband while she slept.

About 600 people attended the service, including the parents of both Lori Hacking and her husband, Mark, who has been charged with her murder.

Lori Hacking, 27, has been missing since July 19. Authorities have been searching a landfill for her remains.

Scott Dunaway, president of the LDS Windsor Stake of The Church of Jesus Christ of Latter-day Saints (search) in Orem, noted the outpouring of concern for the Hacking family as the disappearance drew national attention.

"She has become a daughter, a sister and a granddaughter to so many people," Dunaway said.

The service included a display of Hacking's wedding dress, a poster-sized photograph of her and a plastic bucket used to gather donations for the search efforts that followed early reports of her disappearance.

Her brother, Paul Soares, recalled growing up with Lori. "We never worried about her dating the wrong kind of guy," he said. "I've thought about this over the last couple of days."

Mark Hacking (search), 28, reported his wife missing July 19. He said she had gone jogging and never showed up for work. That night police found him naked outside a hotel, and he was taken to a psychiatric hospital.

Mark Hacking's two brothers talked with him at the hospital and later told police he confessed to killing his wife while she slept and dumping her body in a trash bin.

Lori Hacking's body, presumed to be in the Salt Lake County landfill, has not been found despite numerous searches. Searchers with cadaver dogs were to return to the landfill Saturday night.