I think that it would be incredibly callous and irresponsible for police or the public to assume that there is no kidnapped or endangered child in need of immediate rescue. This is the type of rationale used by many to label children as runaways and therefore in do need of rescue.
There are plenty of evil people in this world who would keep quiet even if they know who this boy or kidnapper is. People who are doing illegal things...selling or possessing illegal drugs, illegal guns, harboring, dating, or the family member of a wanted person, people whose own children bear the bruises scars, and venereal diseases of being beaten or raped by their own family members.
This assault by an adult on a child was witnessed by a person deemed reliable by police. The child, the bike, and the vehicle were observed by multiple witnesses on multiple separate occasions in the days leading up to the attack. The witness saw the child bite the attacker and use the bike to try to defend himself. Even if the kidnapper was know by or related to the child, this boy is in great danger if not already dead. Anyone who would treat any human being like that is not normal, they are evil.
MOO
Now tell me, if this kidnapper has nothing to hide, why was he seen cruising the neighborhood in the days prior to the attack, but neither the boy or the van has been seen since, even with increased police presence and public awareness?