From this site (ht Rondi)
The assailants are as yet at liberty. I hope they’ll be dead by the time you read this. But if not:. You want me too? Come get me. Because nothing short of killing me — and many more of my kind — will ever shut us up.
And if you don’t believe that now, you’ll believe it very soon. Because there are more of us willing to die for that freedom than those of you eager to take it from us. And soon you will find out that those of us willing to die for that freedom are also much better at killing than you.
So come and get me. Je suis Charlie.