Poisonous Kunai
Kunai was like a throw-knife but with a very distinguished design. It was known as a gardening tool in Japan but now, it is used in some other ways. It was recently advertised as throwing knives. It was used in some movies, comics, etc to be known as a ninja or samurai's weapon. But anyway, Kunai is a perfect throw knife. It has a wedge shape of octahedron blade widens and it has a slim handle that was often wrapped with ropes and on the top is a ring at the pommel for better transportability and can be used as rope-dart.
She had seen it in a lot of movies that even she practiced for months and even until now to perfect it. But she specialized in shuriken. It was faster. Now, with the titanium kunai, wrapped with a gold string. She believed that it could be poisonous. There are no traces of blood or fingerprints.
"Didn't your troops see this?" She asked.
"I stopped them from going in that area. That's why it has yellow tape." He said.