Doubt

"Human, huh?" 

Jiro circled the corpse, taking a closer look at it. The dead body was pale and chalky. The corpse was a man in his mid-thirties, he wore a long dark robe which spreaded around him as he laid on the ground. 

His eyes were wide opened and blood seeped through his mouth. Jiro was sure he was puking blood before passing away. 

In both of the corpse's hands were clenched, fingers wrapped tightly around the handle. Jiro plucked the dagger out of its cold hands and examined it. 

The handle of the dagger was featured with a dragon. The blade was curved, still dripping with blood, and styled in a wicked looking way. It was designed in a jigsaw way that it might rip the victim's flesh out while it was being swung around.

'This type of blade,' Jiro thought seriously. 'Only assassins use it, efficient yet very deadly.' 

Jiro frowned as his eyes roamed from the blade over the dead body and noticed that his throat was slit opened.