Authorities are working around the clock to find Indiana 2-year-old Jada Justice, who was reported missing two weeks ago.

The girl was last seen June 16, when her 18-year-old cousin Eugelica Castillo left her in the car while she bought a gallon of milk at a gas station store in Gary, Ind., the Post Tribune reported.

Castillo was watching Justice since June 8 while her 27-year-old mother was on a trip, according to the newspaper. She was briefly held as a person if interest, but was released.

Police say, however, she and her 24-year-old boyfriend have not been cooperating with authorities, who wouldn't go into specifics.

"If I was responsible for someone else's child and she had disappeared while in my custody, I would have done everything and anything to help find them," Hobart Deputy Chief Jeff White told the Post Tribune. "Let's just say that has not been the case."

White told the newspaper local police and the FBI are working together to find the girl, but that time is not on their side.

"In all my years in police work, I have never seen these kinds of resources dedicated to anything like (the search) for Jada," Hobart Deputy Chief Jeff White told the Post Tribune. Statistically, a lot of time passing is not good for the victim. But we are hopeful and our goal remains to return Jada to her family."

FBI Special Agent Wendy Osborne said Wednesday that more than 100 calls have been received at a hotline — 1-800-CALL-FBI — set up to receive tips concerning the missing girl. She says several leads have been investigated.

The Associated Press contributed to this report.

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