Karl Heideck was born and raised in Philadelphia, and the surrounding area. He graduated from Abington High School in 1999. Afterwards, he attended Swarthmore College and graduated in 2003. Karl worked for several years as an audio technician in theater and live music performances before pursuing law. He attended Temple University Beasley School of Law and graduated in 2009.
Karl has always had a lifelong interest in music, having played guitar since the age of 12. He has been in several bands of varying styles. Karl is also a hockey fan and a one-time player.