Is it murder?

I think it depends on the fine details of the event.
Can you gain from the other person dying?
If you have the ability to stop someone from dying without risking your life (or other lives) then you are have some responsibility.

The definition of murder speaks to specific intent.

” Murder is the unlawful killing of a human being with malice aforethought. Every murder perpetrated by poison, lying in wait, or any other kind of willful, deliberate, malicious, and premeditated killing; or committed in the perpetration of, or attempt to perpetrate, any arson, escape, murder, kidnapping, treason, espionage, sabotage, aggravated sexual abuse or sexual abuse, child abuse, burglary, or robbery; or perpetrated as part of a pattern or practice of assault or torture against a child or children; or perpetrated from a premeditated design unlawfully and maliciously to effect the death of any human being other than him who is killed, is murder in the first degree.
Any other murder is murder in the second degree.”

From this: https://www.law.cornell.edu/uscode/text/18/1111

What you describe falls into an ethically questionable area.

You could be legally considered an accessory before or after the fact, depending on the specifics.

No murder (there’s no intent, before the deed).
Gross negligence, with death as a result, maybe.

There are also laws in certain states which say if you can help someone who is in danger, that you should help that person and can be prosecuted if you don’t. I don’t have all the details, but that’s the gist of it.

Its not murder if they die on there own. In order for it to be murder you have to kill the person out of your own free will. The three degrees of murder are first degree, second degree, and third degree. First degree is when you plan on killing the person time before the murder which can be anywhere from a few days to a couple minutes. Second degree murder is when you kill someone without planing on it. For example killing a new neighbor shortly after moving in without a plan. Third degree murder happens when you kill someone for someone else. Your asking if letting a person die is murder. Unless you poisoned them with something and let them die that would be first degree but if you can’t help them and they die that isn’t murder; it’s letting them get rid of the disease the worst way or by old age.

I recommend that you look up the law to which you refer. There are many resources online. The answers here may not be dependable.

I think it greatly depends on the situation.

@AshlynM
Yes especially if you are the victum or the observer.

Too many variables to tell. What is the person going to die from? Could you do something to stop it? If doing that thing, would you put yourself in mortal danger? For instance, you are walking down the street and you see someone about to be hit by a runaway bus. You have the opportunity to push them to safety but doing so would likely result in your death. They are about to be killed and you didn’t stop it. But it isn’t murder. Now, let’s say you hire someone to kill your significant other. You know the place and the method of that killing. You can call the killer and call off the hit, but you don’t. The person is going to get killed and you did nothing about it…likely you are up for accessory, conspiracy, or murder if you are ever caught.