However , new research in 2015 indicated that Anne may have died in February .
The exact date of her death is unknown , and has long been believed to be in early March , a few weeks before the prisoners were liberated by British troops in April 1945 .
New research in 2015 indicated that Anne may have died in February .
The exact date of her death is unknown , and has long been believed to be in early March , a few weeks before the prisoners were liberated by British troops in April 1945 .