In the OP’s case, there probably is the option of calling Hatzolah, which is preferable, in this case!
Ok, so let’s play it out. Suppose Hatzola agrees to go to your neighbor’s house without clear information on what’s going on. And they arrive in the midst of a potentially dangerous domestic situation, R”L. Or they knock on the door and get no response, but hear disturbing noises inside. What do they do?