Story highlights Kayla-Simone McKelvey, 24, is charged with third-degree creating a false public alarm, prosecutor says

She allegedly made "racially charged threats of violence" via social media, according to prosecutor

The threats on the Twitter account were against black students; McKelvey is African-American

(CNN) The New Jersey rally was intended to show solidarity with students protesting against racism at the University of Missouri.

But one participant at the Kean University event allegedly slipped away to a computer in the university library to make "racially charged threats of violence" via social media, according to the office of Union County Prosecutor Grace Park.

Kayla-Simone McKelvey, 24, has been charged with a count of third-degree creating a false public alarm, Park's office announced Tuesday. If convicted, she faces three to five years in a state prison.

McKelvey, who graduated in May, was among the more than 100 participants at the November 17 rally.

From a library computer, McKelvey -- who is African-American -- allegedly created an anonymous Twitter account and posted "racially charged threats of violence against black Kean students," according to the prosecutor's office.

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