March 26th marks one month from the date my husband, Avijit Roy, and I were brutally attacked on the Dhaka University campus. Avijit wrote about science and humanity, critiqued religious fundamentalism, and created the first online Bangla platform for freethinking. For these reasons, religious extremists hacked Avijit to death with machetes. The attack occurred in a crowded place with dozens of eyewitnesses, surveillance cameras and police checkpoints. An Islamist terrorist group 'Ansar Bangla-7' has even claimed the responsibility on social media for the attack. Despite all these leads, the only progress that has been made after one month of investigation is a seemingly tangential arrest.

While the international community has offered help with the investigation, the Bangladeshi government has failed to mention a word about Avijit's gruesome murder since the day it occurred. This is alarming on many levels. Where are the leaders of Ansar Bangla-7? Why haven't they been arrested or questioned? Similar attacks on secular writers have happened before. This turning of a blind eye feeds both the public's sense of cynicism and the terrorists' sense of invincibility. We demand that the Bangladeshi government address religious terrorism at its root and stop a legal culture of impunity, where writers can be killed without the killers being brought to trial.

March 26th is also Bangladesh's Independence Day -- a day that commemorates the founding of a country that was based on secular laws with freedom for all. Instead, it saddens us that we have to spend today begging for justice against the atrocious deeds of religious fanatics. As Avijit's wife, fellow writer, and a freethinker, I reiterate my condemnation of this attack and urge the Bangladeshi government to speak up and pursue a thorough investigation.

The writer is a blogger and wife of slain activist Avijit Roy