Behind the Candelabra is a 2013 American biographical comedy drama television film directed by Steven Soderbergh from a screenplay by Richard LaGravenese, based on the 1988 book of the same name by Scott Thorson and Alex Thorleifson. From Wikipedia
Thorson, who chronicled his relationship with Liberace in a memoir and testified in a high-profile murder trial, passed away from cancer and heart complications.