According to Yahoo! News, Kevin Curtis, of Mississippi, was arrested and charged with threatening to harm President Barack Obama.

The report says that law enforcement officials zeroed in on the part of the cryptic-like message contained in the letters that said "I am KC, and I approve this message".  Authorities then started looking for a constituent with those initials.

I can hardly wait for more information on Curtis to come out; I am curious as to what his "beef" is with the government officials targeted.