He wanted to improve himself . NEW : The mother of the dead diving partner asked to speak with Alvarenga . Jose Luis Alvarenga said he was lost at sea for 13 days . He has returned to a hospital due to exhaustion and malnutrition . Alvarenga said he had to toss his companion 's body overboard after he died .
NEW : The mother of the dead diving partner asked to speak with Alvarenga . Jose Luis Alvarenga said he was lost at sea for 13 days . He has returned to a hospital due to exhaustion and malnutrition . Alvarenga said he had to toss his companion 's body overboard after he died .