Could the former Girflriend of Cali know more about the Kurt Cobain Death murdercase?

There was an interview with Jessica Harper. And her reaction about the Kurt Cobain Death investigation is very interesting. 

 In 1994 and at the time of the death of Kurt Cobain, Jessica Harper was the girlfriend of Michael "Cali" DeWitt, Kurt Cobain and Courtney Love's male, live-in nanny. Jessica Harper was at the house for much of the strange goings-on that happened during the time that Kurt was allegedly missing on April 1, 1994, and before his body was found on April 8, 1994. In  an interview a question is posed to Jessica Harper and Harper reveals that she is incredibly anxious and unwilling to talk about the subject. 
Many feel that Jessica Harper knows far more than she has let on and may be helping to covering up the truth. She avoids to answer the question posed to her and along with her glowing opinions of Courtney Love may indicate that Jessica Harper may have been paid to ensure her silence about the Kurt Cobain Murder Death investigation.