3 Beheaded In US Last Year

Shoudn't it be all over the 24 hour news cycle if there was a beheading in the US last year? What if I said there were three? That should ring plenty of bells but I don't recall reading of such a thing or seeing it on the news shows. Authorities say they were drug cartel killings. So what. Let them happen in Mexicao or Columbia if necessary but not inside our borders.