[2][3] He was then in a fusion band led by an American expatriate, vibraphonist Dave Pike, and recorded the album Noisy Silence – Gentle Noise (1969).

[3] Five years later he started the United Jazz + Rock Ensemble, a shifting collective that at various times included Charlie Mariano, Albert Mangelsdorff, Ack van Rooyen, and Barbara Thompson.

[3] In 1977 Kriegel co-founded the label Mood Records, which released his own music and that of the United Jazz + Rock Ensemble.

[3] "During the 1990s, he ceased his activities as a leader and concentrated instead on working as a composer and on his longstanding second career as a cartoonist; his illustrations appeared in newspapers, magazines, books, and animated films.

"[2] Manchmal ist es besser, man sagt gar nix, a book containing some of his cartoons and writings on jazz and other topics, was published in 1998.