Law professor's killer stalked him 'like a shark circling' before ex-mother-in-law's murder-for-hire ambush

After leaving the gym, Dan Markel drove home expecting an ordinary day. Instead, his killer was waiting for him.

As he arrived home, the prominent Florida State University law professor was talking on the phone with music teacher Stewart Schlazer about school options for his children. Then the conversation took a terrifying turn.

"Can you please hold on a second? There's an unfamiliar person in my driveway," Markel said.

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