A woman pleaded guilty and was sent to prison Wednesday for threatening a man whose 6-year-old son was killed in the 2012 mass shooting at a Connecticut school, which she contended was a hoax.

Senior U.S. District Judge James Cohn in Fort Lauderdale sentenced Lucy Richards, 57, to five months in prison, followed by five months of home detention. She pleaded guilty to interstate transmission of a threat to injure in communications with Lenny Pozner, the father of Noah Pozner, who died in the Sandy Hook school shooting in Newtown, Connecticut.