A lawyer for funk musician George Clinton has said the 63-year-old star was illegally searched before being charged with drug possession.
George Clinton led funk bands Parliament and Funkadelic
Mr Clinton was released on bail after his arrest in Tallahassee, Florida, on Saturday. Police said he had a bag of crack cocaine and a glass crack pipe.
Lawyer Matt Willard said he would file an innocent plea on Wednesday.
"It appears as if the detention, search and subsequent arrest of Mr Clinton were all unlawful," he said.
"It has already been determined that the facts outlined in the (arrest report) are inaccurate, and at times, misleading," he added.
A spokesman for Florida's Tallahasse Police, Stewart Clendinen, said the department stood behind the facts in the arrest report.
Cocaine possession in the state carries a maximum of five years in prison. Clinton is also charged with possession of paraphernalia relating to the pipe.
Mr Clinton's career took off in funk bands Parliament and Funkadelic in the 1960s and 70s before going solo, gaining a reputation as a pioneer of the genre.
He continues to tour the US with his P-Funk All Stars.