[1] A member of the National Movement for Stability and Progress (NDSV), he served on the Municipal Council of Sofia from 2003 to 2011.
He completed his compulsory military service in Musachevo [bg] as a counterintelligence officer.
[2] Karolev became famous in the mid-1990s due to his authorship of numerous articles on economics.
He was then transported to Pirogov Hospital in Sofia and placed in the intensive care unit.
[3] In September 2021, he was transported to Acibadem City Clinic Tokuda Hospital.