Do you mean Willow (or Willowy) Garden?

I stobbed her with a dagger,
Which was a bloody knife,
I threw her in the river,
Which was a dreadful sight.
My father often told me
That money would set me free,
If I would murder that dear little girl
Whose name was Rose Connelly.
And now he sits in his own cottage door,
A-wiping his weeping eye,
And now he waits for his own dear son,
Upon the scaffold high.
My race is run beneath the sun,
Lo, hell's now waiting for me,
For I have murdered that dear little girl
Whose name was Rose Connelly.


I don't think the father did the murder, but it's conceivable given the ambiguity of who's speaking in the final three lines.