um, no, I wouldn't take the chance. ~shudder~ Sometimes food may not necessarily taste or look bad but can still harbor something unsafe. 5 years?? No way! And you don't know these people. Not that they are untrustworthy but I just wouldn't take the chance with my family.
I don't eat meat, and never have, but putting myself in your shoes, I'd most likely throw it out (even though it would be painful to do so).