amicicide
/əˈmɪsɪsaɪd/; /æmɪˈsaɪd/; /ˌæmɪsɪˈsaɪd/; /aɪˈmɪsaɪd/Definitions
1. noun
A person who kills or harms friends or close associates.
“The police investigated a case of amicicide and discovered that the victim’s best friend was responsible.”
2. noun
The act of killing or harming friends or close associates.
“The amicicide was a shocking turn of events in the otherwise peaceful community.”