COBB COUNTY, Ga. - A search is underway for a well-known Cobb County dentist who vanished after failing to show up for work this week.

What we know:

Dr. Melanie Nadler Litt was reported missing Tuesday morning when she did not arrive at Family Dentistry at Seven Hills in Dallas, where she was scheduled to work. Friends say she had worked the previous day at another office off Villa Rica Way in Marietta.

Co-workers contacted Cobb County Police, who performed a welfare check at her Marietta home. Investigators found her phone inside the house, but there was no sign of Dr. Nadler. Her vehicle was also missing at the time.

Friends say her car was later located abandoned behind a business off Barrett Parkway.

What they're saying:

"That’s completely out of character for her, completely,"

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