STATEN ISLAND, N.Y. -- A 44-year-old NYPD school crossing guard faces multiple charges stemming from a bizarre conflict where she allegedly sent racist and threatening letters in an attempt to frame a chiropractor.

Jennifer Becker, 44, has been charged by police with aggravated harassment, making an apparently sworn false statement, falsely reporting an incident, endangering the welfare of a child and tampering with physical evidence, according to a statement from the NYPD's Deputy Commissioner of Public Information.

All charges against the chiropractor, Danielle Serini, are expected to be dismissed Thursday after an investigation revealed her accuser, Becker, allegedly tried to implicate Serini by sending racist letters as part of an ongoing feud, law enforcement sources said.

Becker was taken into custody Wednesday afternoon in connection to the hoax, a police source said.

Sources said the crossing guard allegedly sent at least 12 letters meant to be traced back to Serini to schools, police officers, and a reporter with the Staten Island Advance who had covered the chiropractor's original arrest.

Some of the letters even had a photo of Becker's son.

A flyer received by the Advance contained a photo of Becker's son, a racial slur, and an unidentified phone number.

"BLACK LIVES DON'T MATTER," the flyer read. "KILL THIS N----- PIECE BY PIECE AND FEED IT TO THE NYPD."