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
The Allman Brothers Band March 11, 12, and 13, 1971 — at the Fillmore East in New York, for which the band was paid a nightly $1,250. "At Fillmore East" was released in July 1971 by Capricorn Records as a double album, "people-priced" for the cost of a single LP. While previous albums by the band had taken months to hit the charts (often near the bottom of the top 200), the record started to climb the charts after a matter of days. "At Fillmore East" peaked at number 13 on "Billboard" Top Pop Albums chart, and was certified gold by the Recording Industry