https://www.foxnews.com/us/new-york-...cert-officials
New York man kills girlfriend, posts pics to Instagram after she reportedly kissed other man at concert
Oneida County District Attorney Scott McNamara said that the prosecuting office will likely treat the murder of Bianca Devins, 17, as a case of “extreme emotional disturbance” after an early investigation into the events that led to her killing suggest that the suspect, Brandon Clark, 21, didn’t plan it.
“Under the law, there's something called extreme emotional disturbance," McNamara told WKTV. "It doesn't negate the crime, but it mitigates it.”
He went on to say that it would likely reduce the level of crime Clark would face, bringing his charge of second-degree murder down to “manslaughter in the first degree.”
So basically in NY you can kill someone if they hurt your feelings and you'll get a lesser charge.