In the movie, the murder is solved after about a year; in real life it took 3 years.
In the movie, Jean asks Ellen to move out, but this did not happen in real life. Mrs. Avila never asked Karen Severson to move out and also let her stay in Missy's room and even wear her clothes.
Tiffani Thiessen, who plays Jenny Monroe said on her question-and-answer blog that playing Jenny was the hardest role she ever played in her career and it was the most emotionally and physically exhausting role for her.
Jenny sports a braid in her hair when she has it half-up. After her death, Ellen starts braiding her hair the same way Jenny did, hinting at her obsession.