[1] In 1976, the German group Jail released their only album You Can Help Me, which featured Helmut Köllen as a guest musician on some of the songs (vocals and guitar), including the A-side of the band's single, "Julie".
[1] The album featured Helmut Köllen on vocals and guitar (bass, acoustic and electric),[3] and also fellow Triumvirat musician and cousin Jürgen Fritz,[1][n 2] who played keyboards, and helped to engineer and produce the album along with then famous German engineer and record producer Conny Plank at "Conny's Studio", Wolperath, West Germany.
[1] In January 1975, Helmut Köllen appeared with Triumvirat on In Concert, a television show broadcast by ABC, playing music from the Illusions on a Double Dimple album.
[n 6] On 3 May 1977, Köllen died from carbon monoxide poisoning at the age of 27 while listening to some of the studio tracks in his car's cassette player while running the engine in his garage.
[6] A little while after his death, German group Birth Control wrote and recorded a song as a tribute to Helmut Köllen entitled "We All Thought We Knew You", which was featured on their 1977 album Increase.