A Washington man who is on probation in a 2009 felony drug case is back in jail on charges that he physically abused his two-year-old son, authorities said.

Michael Boyer, 31, was being held on a $75,000 cash-only bond after being charged Wednesday afternoon with felony child abuse and neglect, Franklin County Sheriff Gary Toelke said. 

The man admitted to beating his infant son, first with his hand, then with a belt, on Monday night because the boy would not go to bed and again on Tuesday morning because the child would not get up, the sheriff said. 

St. Clair police notified the sheriff's office about 4 p.m. Tuesday after responding to the Building Blocks Daycare Center to a report that workers had noticed large bruises on the child's buttocks, side and lower rib area. 

Boyer had left the child at the center, according to reports.

St. Clair police requested deputies investigate the case after learning that the alleged abuse happened outside the St. Clair city limits.

Deputies questioned Boyer, who was at the daycare when they arrived. He admitted disciplining the child but said he did not feel the spanking was excessive.

Toelke said the toddler and two other of Boyer's children were turned over to the Missouri Division of Family Services. The other two children did not show signs of bruising, he said. 

The sheriff said Boyer has prior arrests for stealing, and was indicted in 2009 on the Franklin County drug charge. In 2011 he was placed on five years' probation in that case.

According to court records, in 2011, Boyer was given a suspended imposition of sentence on the charge of possession with intent to distribute a controlled substance and was placed on supervised probation and ordered to perform 200 hours of community service. 

In December 2012, Circuit Judge Gael Wood issued a memo waiving the order for community service, according to online court records.