At Fillmore East During this time, the group began struggling with drug addictions. Everyone in the group, with the exception of the brothers, was also struggling to make a living (vocalist Gregg Allman received more money from royalty payments and Duane more from session work). In one incident, tour manager Twiggs Lyndon stabbed and killed a promoter for not paying the band; he later claimed temporary insanity. Their fortunes began to change over the course of 1971, where the band's average earnings doubled. The Allman Brothers Band had first played Fillmore East in December 1969, opening for Blood, Sweat & Tears for three
At Fillmore East of Elizabeth Reed." When first commercially released, it was issued as a double LP with just seven songs across four vinyl sides. "At Fillmore East" was the band's artistic and commercial breakthrough, and has been considered by some critics to be one of the greatest live albums in rock music. It has also been ranked among the best overall albums by artists and continues to be a top seller in the band's catalog, becoming their first album to go platinum. In 2004, the album was selected for preservation in the Library of Congress, deemed to be "culturally, historically, or aesthetically