Of course
If the criminal is good at his job, it would be impossible to tell poisoned from non-poisoned food. The best way to tell is to have someone else try the food first, then see if they die. If they do die, it's probably poisoned.
because its poisoned...
cocaine
Yes, there is a risk of getting poisoned from a cut by a metal can if the contents are toxic. Additionally, a deep cut from a metal can could lead to infection if not properly treated. It is important to seek medical attention if you experience a significant injury from a metal can.
There is no such thing as "poisoned milk."
he was poisoned
He was poisoned by his servant
He was poisoned by shellfish.
why not
no he did not he got poisoned but did not die
We would all die.