Police arrested the father of a 7-year-old boy who bit his son's toes hard enough to cause deep bruising and crack his toenails.

Todd Wayne Hall, 34, faces a felony second-degree battery charge, said Bentonville Det. Mark Jordan. Jordan said the boy was 5 when Hall bit his toes, causing holes to appear in his toenails.

Hall was being held in Benton County jail pending a hearing.

Jordan said he's never seen anything like this in his 13-year career. Police arrested Hall in 2000 for the same crime involving his 11-month-old daughter while they lived in Bentonville, Jordan said. Hall was convicted, but paperwork did not show if he served any jail time.

In February, the Department of Human Services placed the boy in the custody of his grandparents.