DURANGO, Colo. (CBS4)– Detectives have followed up on new leads in the disappearance of Dylan Redwine.

The teenager has been missing for four months. The 14-year-old disappeared from his father’s home in Vallecito in November 2012, the Monday before Thanksgiving.

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Investigators said they have tracked down a boy who a postal worker saw walking with Redwine the afternoon he disappeared. They questioned him and determined that he is not connected to Dylan’s disappearance.

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They’ve also found the man who was seen in Vallecito looking for gas that day. Investigators have ruled him out as someone linked to his disappearance.

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A reward for finding Redwine tops $50,000.