They were betrayed by person or persons unknown. Three separate criminal investigations after the war failed to find enough evidence to indict anyone in their betrayal. At this distance from their betrayal (67 years) it is very unlikely anyone will ever be brought to justice, as the betrayer or betrayers are most likely dead now.
Peter van PelsHermann and Auguste van PelsFritz Pfeffer
The Van Daans joined the Franks in the secret annex in 1942.
july
one of Anne franks challenges was being in the secret annex for 2 years
The Franks family lived in the secret annex for 2 years and 29 days before they were captured by the Germans Police.
amststerdam
the secret annex
the secret annex
they hid in the secret annex at Otto's work place
A little bit more than 2 years
Anne Frank's secret annex had two floors. It consisted of several rooms where Anne and her family lived in hiding during World War II.
Anne Frank's secret annex was built in 1739 as an extension to the existing building in Amsterdam, the Netherlands. Anne and her family went into hiding there in 1942 during the Nazi occupation.