[apro]

I have never ever seen or even heard of a scenario where two suspects attack a victim and then remain on the scene in full view waiting for the police to arrive.

I think it was the shock value of it all that made people kind of stand there like "OMG what just happened". The 9/11 terrorists used similar shocked tactics on the planes they highjacked.

[rjbemsha]

"I have never ever seen or even heard of a scenario where two suspects attack a victim and then remain on the scene in full view waiting for the police to arrive."

A look at Muslim traditions influenced by the Order of Assassins may help.

Perhaps most terrifying, the Assassins chose not only a close and personal manner of killing but performed it implacably, refusing to flee afterward and appearing to welcome their own swift death."

http://www.historynet.com/holy-terror-the-rise-of-the-order-of-assassins.htm#sthash.nVzcIrGV.dpuf