It is reasonable to be skeptical of the accuser especially since the accused is a well known, established member of the kehilla, while the accuser is a heretofore unknown girl who is no longer part of the kehilla.
However she has a few saving graces.
Yanky Horowitz is extremely street smart-you cannot get one past him. He is also a very respectful person. If he endorsed her it’s because he verified independently that her claims are indisputably true.
Her parents,who are part of the kehilla, backed her.
A frum therapist took the stand and testified that she advised the accuser to press charges. Coming forward was not her own idea. She moved on with life. She holds a job and goes to college.