A U.S. citizen and resident of the San Francisco Bay Area, Darr is a translator and interpreter of classic Islamic mystical texts.
By 1985 he left the Shah groups and began working in Afghan refugee camps in Pakistan and making overland trips inside Afghanistan.
Darr spent the next couple of decades studying traditional Sufism along with specialized disciplines such as abjad (Islamic numerology).
From 1988 to 1998, he studied miniature painting with Afghanistan's great miniaturist, Homayon Etemadi (died 2007).
For almost two decades he was the student of the late Afghan Sufi, Raz Mohammed Zaray (died October 2010).