By Chisanga Malata / Published 23rd September 2014 sunderland, sunderland fc, brown, gus poyet, poyet, asamoah gyan, gyan, ghana, black stars, castroBLACK STAR: Former Sunderland star Asamoah Gyan has been accused of performing a ritual sacrifice on Ghanian rapper Castro [GETTY] The 28-year-old, who spent two seasons in the Premier League, has been grieving for the loss of his close friend - who went missing in July. The Ghanian superstar disappeared while on holiday with Gyan in late July, along with Janet Badu. Both were presumed to have drowned, but speculation surrounding Castro's death has been rife due to the fact his body has not been found. The lack of a body has sparked rumours in Ghana that Gyan, who left the Premier League in 2012, performed a human sacrifice on the rapper.