JACKSONVILLE, Fla. — When Dequan Jackson had his only brush with the law, at 13, he tried to do everything right.

Charged with battery for banging into a teacher while horsing around in a hallway, he pleaded guilty with the promise that after one year of successful probation, the conviction would be reduced to a misdemeanor.

He worked 40 hours in a food bank. He met with an anger management counselor. He kept to an 8 p.m. curfew except when returning from football practice or church.

And he kept out of trouble.

But Dequan and his mother, who is struggling to raise two sons here on wisps of income, were unable to meet one final condition: payment of $200 in court and public defender fees. For that reason alone, his probation was extended for what turned out to be 14 more months, until they pulled together the money at a time when they had trouble finding quarters for the laundromat.