A country singer under investigation for child sex abuse crimes has committed suicide ... TMZ has learned.

Daniel Lee Martin died from an apparent self-inflicted gunshot wound ... this according to the Pasco Sheriff's Office in Florida.

Martin was arrested January 27th after the alleged victim, a child, told cops Martin exposed himself to them while the 2 were sitting on a sofa. Cops say the victim claimed Martin fondled himself and shared pornographic images. Cops went on to say there were numerous incidents where the victim spent the night at Martin's home.

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Poster Comment:

Sometimes we get lucky,and the trash takes itself out.