Her killing should be investigated, and the perpetrators prosecuted, not out of any concern for this stupid little bitch, but out of concern for their next targets, and because they broke the public peace and should be prosecuted for that, regardless of what the little bitch thought.
The police and the prosecutors do not answer to individual crime victims, no matter how appealing or, as in this case, unappealing, but to the public at large and to the public interest.