Police and family members are searching for 16-year-old Cassandra Lomas, who went missing on New Year’s Day, according to Pennsylvania State Police.

Cassandra, whose mother died Dec. 16, was last seen by her grandfather, whom she was living with in Lehman Township, Pennsylvania, between 2 and 3 a.m. on New Year’s Day.

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Police believe that Cassandra could be headed to either Georgia or New Jersey. It’s unclear who she’s searching out: Various theories have included her boyfriend, biological father or a step father.

Guy Lomas, her grandfather, told the Pocono Record that Cassandra was in a “fragile position” after her mother’s death, which occurred just days after Cassandra’s 16th birthday. “I think she just became overwhelmed,” he said. “She’s a very intelligent, very outgoing. She made friends easily.”

Cassandra is an honors student, a member of the swim team, and recently placed fifth in an apparel and accessories marketing competition. “For all intents and purposes, she was doing well and on the road to being successful,” her grandfather said.