He had recently been returned to court for violating his probation in that matter.

And he received an additional 18 months for violating probation.

"But if he violates his probation, it is much more serious."

He was sent to another rehabilitation center, but again violated probation.

But less than two years later, he violated his probation and tried to rob someone with another weapon.

He was jailed for seven months after violating his probation from a late-90's drug charge.

This violated his probation and he received a 90-day jail sentence.

Less than two weeks ago, they said, he came to New York, violating his probation.

These people are the most likely to violate probation and end up back in jail.

"We're not working for the Feds to see whether they're violating their probation," one official said.