Aaron Carter missed rehab therapy sessions the day before he was found dead

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Melanie Martin was doing her best to help him through their separate relationship

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Although he kept Melanie Martin in the dark about any recent addiction struggles.

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Melanie signed up him for outpatient rehab after confronted Aaron back in September

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Aaron received a welfare check around that time fans worried he was huffing compressed air off-camera.

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We're told that Aaron agreed to go through with the program, with the idea that it would go a long way in helping him regain some custody of his son, Prince.

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Sources say he put the schedule on hold but was reinstated last week - he was supposed to have an online session on Friday evening, but that was not a show.

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When the facility arrived to tell Melanie, she gave them the sad news.

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Keep in mind, it's possible - if not possible - he missed that appointment because aaron was already dead.

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