However , things get complicated when their killer is murdered , and the person who committed the crime happens to be the victim 's mother .
When evidence reveals that the death was possibly a random killing , they are able to track down their suspect to his apartment .
Things get complicated when their killer is murdered , and the person who committed the crime happens to be the victim 's mother .
When evidence reveals that the death was possibly a random killing , they are able to track down their suspect to his apartment .