Joseph "Jo Mersa" Marley, son of musician Stephen Marley and the grandson of reggae legend Bob Marley, has passed away aged 31. The Jamaican-American reggae artist was reportedly found unresponsive in a vehicle. "I extend my deepest condolences to Stephen, Jo's mom...the Marleys and other family members," Jamaica's Minister of Culture, Gender, Entertainment & Sport, Olivia Grange, tweeted.