A woman charged with sending death threats to a former Palm Beach County man whose 6-year-old son was murdered in the Sandy Hook Elementary School shootings was arrested Saturday in Tampa, jail records show.

Lucy Richards, 57, was expected in U.S. federal court in Fort Lauderdale March 29 to plead guilty to four counts of transmitting threats through interstate communication, but failed to appear for the hearing.

An arrest warrant was issued by a judge after Richards did not show up in court. She was arrested by Tampa police but no further details were available.

Richards was expected to plead guilty and sentenced to house arrest and probation by prosecutors before failing to appear in court. Robert Berube, Richards’ attorney, said last week that the deal with prosecutors is now likely off the table.

Richards is accused of making the threats against Len Pozner, a one-time Palm Beach County resident whose son Noah was one of 19 children and six adults killed by Adam Lanza in 2012 in Newtown, Conn.

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Before the arrest warrant was issued, Richards was free on $25,000 bond and barred from websites that push conspiracy theories.