A singer, who attempted suicide last year, has been questioned over his alleged use of a drug widely used to treat insomnia, a prosecutor said Saturday.

Son Ho-young, a member of once popular boy band G.O.D., was called in by prosecutors in late June on charges that he took zolpidem, a common prescription medication that induces sleep.

The 34-year-old allegedly took the drug in May 2013 when he attempted to kill himself just days after the body of his girlfriend was found in his car along with an empty bottle of sleeping pills, a used briquette and a suicide note.

The prosecutor said no decision has been made yet on Son. Son's management agency admitted that the singer took the insomnia drug in an apparent suicide attempt following the death of his girlfriend, but since then, he has never used the drug.

Son released a solo album in 2006 after G.O.D. became inactive. (Yonhap)