In Spanish the word "asesinar" has 3 meanings. Check this out since it may help you: http://dle.rae.es/?id=3yfqtFV Anyway I had to look at it because in Spain as far as i know it is not a common expression.

I think is better Kill without Kill I guess this must be some kind of metaphor. And the sentence is right in spanish but Is not coherent to say Kill without Kill asesinar sin matar