Occupiers neglect their children

A few days ago the Washington Post revealed that the occupier encampment in the city's McPherson Square has become a rat paradise because of the filth of the inhabitants in their illegal temporary home.

And into this sanitation nightmare parents left their 13month old infant alone the Washington Post reported the following day.  Hearing a baby crying, occupiers notified the police.  Later a man claiming to be her father returned for her.   US Park Police, who are in charge of McPherson Square, described the scene where they found the little one. 
"Mid 40s, rainy, onesie, alone," Schlosser said, describing the circumstances that led police to arrest the man.
The child is with DC's child protective services; the alleged father charged with attempted second-degree cruelty to children. 
Later the occupiers denied this father was part of their group. 
How could they tell; they have an admission procedure?