Brandon Johnson supplied Demi Lovato with the drugs she ODed on a month ago.

For reasons we can't fully comprehend, he just gave a detailed interview to TMZ on what happened that night.

According to Johnson, Demi texted him at 4 AM to come over. He explained that he had done drugs with Lovato many times before and they had a "somewhat" sexual relationship. (Sources close to Demi admit she hung out with Johnson, but deny there was a sexual relationship.)

That night they smoked Oxycodone pills Johnson had obtained in Mexico. He wasn't sure if they were laced with fentanyl.

He said she fell asleep at about 7 AM and he tucked her in and went home. An assistant found Lovato ODing at about 11:30 AM and called 911.

Johnson claimed Lovato knew exactly what she was getting into that night.

 ‘They’re after market pills and they’re much stronger. She [Demi] understood fully and it’s unfortunate what happened. ‘But for anyone to think there was any misconception on my behalf is absolutely ridiculous. I’m not here to hurt anybody. I care for her very much, she means a lot to me.’

Johnson has had a rough year. In March, he was arrested with a stash of guns, drugs, and cash. In June, he got busted for DUI and cocaine possession.

Lovato is recovering from her overdose in rehab.