Her books and presentations often focus on real-life crimes, providing in-depth analysis and firsthand accounts from those involved, including law enforcement officers and victims' families.
Some of her notable books include The Frankston Murders, which examines the case of serial killer Paul Denyer, and Once a Copper, a biography of former police officer Brian "The Skull" Murphy.
In addition to her books, Petraitis has gained recognition for her true crime podcasts, where she delves into both well-known and lesser-known cases.
Petraitis regularly speaks on podcasts, including Australian True Crime hosted by Meshel Laurie and Emily Webb.
[2] She was also instrumental in creating the Casefile Presents series titled The Vanishing of Vivienne Cameron[3] – a 10-episode podcast released in 2020 covering the case.