My friend left for Brazil from Nigeria, on the 15th of June. He was supposed to return 5 weeks after but he's not yet back.

He is not replying his mails and he hasn't called since. We hav a project dat starts on d 4th of August and dis July 31st already. He's a key man to dat project. Am so confused and worried. And I dont know what to do.

Is der a way I can find out if he has extended his visa or sth? Wot if sth has happened to him, how do I get to find out?