Long-time Los Angeles City Councilman Tom LaBonge passed away Thursday according to his son, Thomas LaBonge. 

LaBonge represented the 4th district, serving from 2001 to 2015. He won a special election to fill the seat left vacant by the death of long-time council member John Ferraro, according to his wiki page.

Thomas LaBonge told NBCLA tonight the family still did not know what caused the former councilman’s death.