SAN ANTONIO -- A third person wanted in a San Antonio child abuse case in which one toddler was chained to the ground and another tied to a door with a dog leash has surrendered to authorities.

Bexa County Sheriff's spokesman James Keith says 36-year-old Deandre Dorch surrendered to deputies at the county jail late Tuesday. He's charged with two counts of serious bodily injury to a child by omission.

Keith said Wednesday that Dorch is the father of several of the eight children found alone at the home about two weeks ago. Six were inside.

Deputies say Dorch and his wife, Porucha Phillips, were supposed to be caring for the two left in the yard. Phillips and the toddlers' mother, Cheryl Reed, have also been charged in the case.

The two children who were found outside, a boy and a girl, had suffered hundreds of scars and injuries from months, perhaps years, of abuse, a sheriff's official said Friday. Several piles of human feces were found nearby, and the boy was wet, indicating he was left in the rain.

Doctors who treated the children after they were found April 29 determined they had old injuries indicating a long period of abuse. One of them also was suffering from hypothermia and had a broken arm resulting from the way she was tied to a garage door using a dog leash, Bexar County sheriff's spokesman James Keith said.

Authorities initially said the children were 2 and 3 years old, but Keith says they may be a year older.