This article states that family members "said police were called to her apartment about 3:30 a.m. July 29 for a noise complaint from a neighbor involving the missing woman's dog".
http://www.ldnews.com/ci_21266936?IADID=Search-www.ldnews.com-www.ldnews.com
The same evening, when parents appeared on Jane Velez-Mitchell Show:
In a very strange twist, police were called to her duplex not once but twice right around the time she disappeared. The first call from a neighbor complaining about Kortne somehow arguing or talking with a neighbor loudly.
http://transcripts.cnn.com/TRANSCRIPTS/1208/09/ijvm.01.html