IONIA, Mich. (WOOD) — A man accused of sexually assaulting a child who avoided registering as a sex offender under a plea deal is in trouble with the law again.

Employees at the Ionia County jail confirmed Dean Stauffer was arrested Wednesday and formally charged Thursday for violating his probation by allegedly using methamphetamine.

Stauffer was initially charged in 2016 with three counts of first-degree criminal sexual conduct which, if convicted, would have required him to register as a sex offender — and aggravated indecent exposure. However, he eventually reached a plea deal to admit to lesser charges of second-degree child abuse and indecent exposure.

The case involved a girl who was 5 years old when she told her grandmother and mother that Stauffer had abused her.

However, Ionia County Prosecutor Kyle Butler contradicted much of what the girl’s mother said in her statement, claiming that the girl’s sister made statements to police that suggested she didn’t believe the abuse had happened. He also said there was no physical evidence: Stauffer’s DNA wasn’t found on the girl’s underwear and medical staff didn’t report any physical trauma to the girl.

One diagnosis made at Helen DeVos Children’s Hospital did point to sexual abuse, but Butler said it was inadmissible in court.

Butler also revealed that Stauffer took two polygraph tests during the investigation. Michigan State Police initially said he passed the first test but later decided it was inconclusive. Stauffer went on to conclusively pass a second test.

In February, a judge decided to honor Stauffer’s plea deal, in which he pleaded guilty to lesser charges of second-degree child abuse and indecent exposure. The deal also called for a sentence of 12 months time-served and probation.