CHARLOTTE, N.C. (AP) — A North Carolina man is headed to prison for threatening President Barack Obama through Twitter during the 2012 Democratic National Convention.

A federal judge sentenced Donte Jamar Sims on Wednesday to six months after he pleaded guilty to one count of knowingly and willfully making a threat to take the life of the president.

Sims admitted using his Twitter account, (at)DestroyLeague_D, to post five threats in advance of Obama's September arrival to speak in Charlotte, including "Plotting president Obama's Murder," ''Ima Assassinate president Obama this evening!" and "The Secret Service is gonna be defenseless once I aim the Assault Rifle at Barack's Forehead."

Authorities say the 22-year-old from Charlotte told them he was high on marijuana when he made the threats. He later wrote an apology to Obama.

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(Photo: Spencer Platt/Getty Images)