Seems that this signer might have an interesting past history.

"According to South African news network eNCA, Thamsanqa Jantjie has “faced rape (1994), theft (1995), housebreaking (1997), malicious damage to property (1998), murder, attempted murder and kidnapping (2003) charges.”

Story @ http://www.timesofisrael.com/mandela-signer-faced-murder-rap-in-2003