What did the FBI investigate Marvin gaye for?

The FBI investigated Marvin Gaye primarily in relation to allegations of drug-related activities and potential tax evasion. In the early 1980s, Gaye faced scrutiny due to his struggles with substance abuse and financial issues, which raised concerns about his legal and financial conduct. However, the investigation did not lead to any significant charges against him. Gaye's life was ultimately cut short when he was tragically shot and killed by his father in 1984.