The person killed was a 23 year old American girl. What she was doing may have been misguided and stupid in many peoples opinion here but her death is no reason for "rejoicing". Anyone that thinks so has a major malfunction.
She likely has a family and people that love her. A mom and dad. As a father I weep for her parents. As a follower of Christ I pray for her soul. And for those grieving for her.
And unlike you, I don't wish for anyones death. That is sick. A dumb kid like this did not "need killin" as we say here in Texas.
Your head is screwed on wrong here.