A new study casts doubt on the theory that Anne Frank was betrayed by Nazi occupiers.
Instead, the study published Friday by the Anne Frank House museum in Amsterdam suggests Frank may have been captured by chance.
The familiar story of Frank's capture says that police were tipped off by an anonymous caller on Aug. 4, 1944. However, after decades of research, the new study suggests there's no conclusive evidence that Frank and her family were ousted by the Netherlands' German occupiers during WWII.
Ronald Leopold, executive director of the Anne Frank House museum, said the new research "illustrates that other scenarios should also be considered."
Instead of focusing on the betrayal part of the story, the museum focused its research on the raid and why it occurred in the first place.
One theory suggests Frank's arrest could have been part of a larger investigation into illegal work or falsified ration coupons.
The study found that two salesmen, who worked in the building where she and other Jews hid out for just over two years, were arrested for dealing ration coupons.
According to CNN, Frank wrote about their arrest in an April 1944 diary entry. She wrote that the salesmen who worked for a company that dealt with food had "been caught, so we have no coupons." Researchers said that entry suggests Frank and the other inhabitants of the annex got some of their food from the men.
The study also noted that at least two of the three policemen who conducted the raid were not there to search for and arrest Jews. Instead, they were focused on cash and jewelry thefts and the illegal distribution of ration coupons.
The museum adds, "The possibility of betrayal has of course not been entirely ruled out by this, nor has any relationship between the ration coupon fraud and the arrest been proven." The museum said further research is necessary to reach a conclusion.
The Associated Press contributed to this report.