Feuerstein was last seen in the vicinity of Mesa Drive and Brown Road in Mesa, Arizona on January 3, 2009. She was carrying a dark blue Kathy Van Zeeland with a yellow Volcom pin attached to the outside. She and the man she was with were supposed to meet a friend at the friend's house, but never arrived. Feuerstein sent a text message to her friend at 10:45 p.m., saying she and her companion were on McClintock/Dobson and would be at his house soon. At 11:10 p.m., she texted her roommate and said she'd be home at 11:30.

Feuerstein's younger sister died of a brain tumor three years before her disappearance, and the family planned to gather on the anniversary of her death on January 4. Feuerstein promised to attend the remembrance, but she never arrived. Her mother thought she might be out with friends. She has never been heard from again.

The man Feuerstein was with on the night of her disappearance is a convicted felon; he previously served a prison term for armed robbery. Two of Feuerstein's friends located him at a campsite on January 6, three days after Feuerstein disappeared. He told them he last saw her when he dropped her off at her apartment on January 3. The following day, the man packed up and left the campsite. Feuerstein herself was also once arrested on felony drug charges, and she told the police she had used heroin daily since she was in eighth grade. It's unclear whether drugs were a factor in her disappearance, however.

Feuerstein hasn't used her cellular phone or accessed her MySpace page since January 3, which is uncharacteristic of her. Her case remains unsolved.