Families have had some success with cases like this, a girlfriend went to jail for 5 years for encouraging her boyfriend to kill himself:

https://www.cnn.com/2019/02/11/us/michelle-carter-texting-su...

William Dinkel posed online as a suicidal nurse and encouraged people to kill themselves and was found guilty:

https://en.wikipedia.org/wiki/William_Melchert-Dinkel