Self-murder

https://www.psychologytoday.com/us/blog/feeling-our-way/201510/suicide-form-homicide

Suicide should be called by its older term as well, since it is.

Threats of suicide, for example, are just as pressing as threats of homicide.

“You can often tell what kind of killer you’re dealing with by exploring the method of suicide: a gun to the head suggests an execution; pills suggest a mercy killing.”