Where was actor Raj Kiran last seen before he mysteriously disappeared 23 years ago?

Filmmaker Mahesh Bhatt said actor Raj Kiran moved to US to live with his brother, where he mysteriously disappeared 23 years ago. After trying to trace him, late Rishi Kapoor once said Raj's brother told him he was at an Atlanta health institution but Raj's daughter denied that. Actress Deepti Naval said he was seen driving a taxi in NY.