It is a domestic violence homicide as it should be.
DOMESTIC VIOLENCE DEFINED
Domestic violence is defined as a pattern of behaviors involving physical, sexual, economic and emotional abuse, alone or in combination, by an intimate partner often for the purpose of establishing and maintaining power and control over the other partner.
DOMESTIC VIOLENCE HOMICIDES DEFINED
Domestic violence homicides are those murders that occur between men and women, husbands and wives, boyfriends and girlfriends, boyfriends and boyfriends and girlfriends and girlfriend relationships. In fact, any murder between intimate partners would be considered a domestic violence homicide. They may also involve third party relationships, such as "love triangles" former husbands and/or wives, and jilted lovers.
INTERPERSONAL VIOLENCE ORIENTED DISPUTES AND ASSAULTS
In Practical Homicide Investigation: Tactics, Procedures, and Forensic Techniques, these murders are classified sex related homicides in the category of INTERPERSONAL VIOLENCE ORIENTED DISPUTES AND ASSAULTS or LUST MURDERS depending on what was done to the victim. The motive in this category of slayings is most often based upon elements of rage, hate, anger, jealously or revenge. The psychological dynamics involved in such violent interpersonal disputes and assaults oftentimes present scenarios which involve violent actions and the classic statement;
"If I can't have you then nobody will have you." This is most common in sexual domestic dispute cases. DYNAMICS
http://www.practicalhomicide.com/Research/domviolence.htm
And we know the violence usually esculates when the victim either leaves or breaks up with the spouse or boyfriend ...girlfriend etc.