Frank J. Brown was 18 when he was last seen in Upper Darby, Pennsylvania, on July 6, 1990. He was wearing black and pink pants and a black Holiday Spa t-shirt the day he vanished. The events leading up to his disappearance are not known, and the timeline of his last movements is sparse.

The Upper Darby Township Police Department opened an investigation but leads went cold and no witnesses with definitive knowledge have come forward. It remains unclear whether he left voluntarily or met with foul play. The case is still open and unresolved; those who knew him continue to hope for answers.

If anyone remembers Frank, his whereabouts in July 1990, or has information that could help, please come forward.