I've always believed - just my personal opinion - that he went inside Tara's home that night and left the biz card in the wreath as a red herring. After calling that many times, then driving 1-1/2 hours, there's no way he simply left it at that. So many people had a key to Tara's home or knew where she hid a spare out front, it would take a lot of convincing for me to believe he didn't. The card was a "just in case someone saw me here" type of thing. Not only was/is he a detective, but he was also trying to keep up with her that weekend. I think it's possible he thought she was inside sleeping, then let himself in and found she wasn't. Orrrrr....he didn't go inside because he already knew she wasn't there and left the card to cover his tracks.
Where are you, Tara?
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