Developmentally disabled boy berated at Yankee Stadium

What was supposed to be a fun trip to Yankee Stadium for a developmentally disabled child from Harrison was ruined when a fan began hurling offensive insults at him. 
Angelica DiMarco says her 4-year-old son Luciano has sensory issues and doesn't understand social cues, which may explain why he could have acted unruly at the Yankees-Reds game Tuesday night. The developmentally disabled boy wears a helmet to stop him from banging his head.
"He may have kicked a man's seat that was sitting in front of us with excitement," she told News 12
In a video that has been seen hundreds of thousands of times on Facebook, a fan calls the boy "retarded" and berates him. 
What made the situation worse for Angelica was not getting any help from Yankee Stadium security.
"We asked for a place for him to go. We were told if we leave the stadium, we can't come back in," she says. 
On the New York Yankees official website, they say using foul or abusive language is strictly prohibited at baseball games. News 12 reached out to the Yankees by both phone and email, but have not heard anything back. 
Until she does hear back, DiMarco says they will not attend anymore Yankees games until they recognize her son's disability.