Mindy McCready Working on Suicide Awareness Video at the Time of Her Death

In a true case of tragic irony, country singer Mindy McCready was working on a video project on suicide awareness before her death Sunday.

Private investigator Danno Hanks told E! News that the singer asked him to work on a version of "I'll See You Yesterday," written and submitted by McCready fan Courtney Dashe.

"She said she wanted to put together this video to help people deal when someone had suffered a suicide in their life and God, she was literally having me write her suicide note," said Hanks. "If I had known, I would have made sure someone was there with her all the time."

Hanks also told E! that the singer sent Hanks a frame for the video containing a suicide hotline number. "I thought she was talking about sending a message about suicide for David's death but this is unbelievable. She was sending me a message," adding,  "I wish I had been more alert to what it was."

McCready was found dead Sunday on the porch of her home in Heber Springs, AR of an apparent self-inflicted gunshot wound.