PITTSBURGH -- George Sodini is accused of going to a sprawling L.A. Fitness Club, turning out the lights on the Tuesday night "Latin impact" dance-aerobics class for women, and opening fire with three guns, spraying dozens of bullets before committing suicide, police said.

Below are the profiles for each of the three women:

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SLIDESHOW: Photos Of Suspect, Victims, Scene
BLOG: Read Text Of Shooting Suspect's Blog

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HEIDI OVERMIER

Heidi Overmier, 46, of the Pittsburgh suburb of Carnegie, was a sales manager at Kennywood, the area's largest amusement park. Colleagues remembered her Wednesday as a behind-the-scenes orchestrator who helped keep the park operating -- from coordinating school trips to organizing special events.

"Heidi's love of life, friendship, and dedication to excellence in all areas of her life will long be remembered," the park's general manager, Jerome Gibbs, said in a statement.

Overmier, who grew up in West Mifflin, another Pittsburgh suburb, was the youngest of five children and had worked at Kennywood since 1998. She attended Penn State University, according to her profile on the professional networking site LinkedIn.

"She would help anyone in the neighborhood. She was very, very active in her church," Overmier's brother, Jim Stapf, told WPXI-TV in Pittsburgh. "We're going to miss her dearly. Now she's with her younger brother and her dad. And we're going to pray now."

Other surviving relatives include a son, Ian, 15. A memorial site dedicated to her on Facebook already had nearly 200 members by Wednesday afternoon.

Neighbors described Overmier as friendly, resourceful and a hardworking single mother who took pains to take care of her modest home, landscaping and building a small rock wall along her front lawn by herself.

Anna Marie Mauti, who lives across the street, fondly recalled Overmier's frequent visits to her front porch to chat.

"She was fantastic, the best (neighbor) you could ever have ... You don't find them any better," Mauti told The Associated Press. "Why didn't he shoot himself and get himself off this earth" before Tuesday's tragedy.

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ELIZABETH GANNON

Elizabeth "Betsy" Gannon, 49, of the suburban community of Green Tree, lived most of her life in the two-story brick house where she grew up. She loved to exercise and was frequently seen walking her red Labrador retriever, Lady, around the neighborhood.

"That dog's going to miss her," said Carl Rady, a retired truck driver who lived next door to her for 35 years and thought of her as a daughter. On Tuesday night, according to the Pittsburgh Post-Gazette, he was summoned to the medical examiner's office to identify her body.

"She never had a bad day. She was always friendly to people," he said.

For the past 13 years, Gannon had worked as an X-ray technician at Allegheny General Hospital in Pittsburgh. Patrick J. DeMeo, the hospital's orthopedic surgery chairman, said in a statement that she was "a wonderful, caring person whose smile would brighten the day of both her colleagues and patients."

"Her life," DeMeo said, "touched that of so many others."

Close friend Mary McVay Fensel was at Gannon's house Wednesday, consoling Gannon's boyfriend. "She loved people, did right by people," she said. "Just cared for the well-being of others."

Gannon was divorced and had no children, her friend, Joanne Conte, told the Tribune-Review.

"She can't be gone," Rady said. "It can't happen that way."

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JODY BILLINGSLEY

Jody Billingsley, 37, of Mount Lebanon, was originally from Ohio and had lived in a quiet neighborhood south of Pittsburgh for the past decade. She traveled frequently for her job -- medical-supply sales, neighbors said -- and sometimes expressed homesickness for her home state.

Billingsley, a former physical therapist, was a health fanatic, neighbors said. She was often spotted biking or running the hills around her home. Diane and John Williams, who live across the street, said they saw her leave around 7:30 p.m. Tuesday -- apparently for the gym. They waved and exchanged smiles.

Billingsley's parents ran a nursery in Ohio, would visit on weekends and frequently brought plants and flowers that were quickly planted in her yard. "She took care of that house," John Williams said. "I'd see her out there every day, after work on weekends, cutting ..."

He trailed off and shook his head. "What a sweet person."

On Wednesday, the small hillside front lawn was filled with well-kept flowers and plants.