Callistus Lekwa’s illiteracy is gradually tearing at the fabric of his three-year-old marriage. The father of two is a secondary school drop-out turned businessman and is married to a Masters Degree graduate.
“Now I understand why my parents were against our marriage,” said Lilian Lekwa, an insurance salesperson. “They argued that the education barrier would cause problems but we felt our love would conquer all...CONTINUE: http://crimefacts.org/the-embarrassment-of-nigerias-rising-illiteracy-levels-by-chinedu-ozordi/

I dont think this person is nigerian, but what prevents him from going back to school?

He can sit for his wassce, gce or whatever options are available, then further his education from there.