In the beginning of the investigation, we didn't thought what the weapons was, but after a time, the victim's body became purple. With this clue, we decided that the weapon wasn't an object but poison. After questioning all the suspects, we realized that there was also a pizza delivery man. When the doctors examined the body, they found that the poison came from the pizza. They finally arrested the delivery man because they noticed that it was actually his friend who wanted revenge. In most cases, the suspects were the family's member, but in this case, it is quite the opposite.

Voilà si tu veux changer quelques petites choses ne t'en empêche pas, j'espère que je t'ai aidé. :)