Here's a version of Little Sadie similar to the one in the DT as Cocaine Blues by T.J. Arnall. It was recorded by Johnny Cash. This is probably where George Thorogood got his version.

TRANSFUSION BLUES
As recorded by Johnny Cash on "Now, There Was a Song!" (1960)

Early one mornin' while makin' the rounds,
Took a transfusion and I shot my woman down.
Went right home and I went to bed.
I stuck that lovin' 44 beneath my head.

Got up next mornin' and I grabbed that gun.
Took a transfusion and away I run.
Made a good run but I run too slow.
They overtook me down in Juarez, Mexico.

Laid in the hot joint takin' the pill.
In walked a sheriff from Jericho Hill.
He said: "Willie Lee, your name is not Jack Brown.
You're the dirty hack that shot your woman down."

Said: "Yes, oh, yes, my name is Willie Lee.
If you've got a warrant just read it to me.
Shot her down because she made me slow.
I thought I was her daddy but she had five more.

When I was arrested I was dressed in black.
Put me on a train and they took me back.
Had no friends for to go my bail.
They slapped my dried-up carcass in that county jail.

Into the courtroom my trial began,
Where I was handled by twelve honest men.
Just before the jury started out,
I saw that little judge commence to look about.

In about five minutes in walked a man,
Holding the verdict in his right hand.
Verdict read: "In the first degree."
I hollered: "Lawdy, Lawdy, have mercy on me!"

Judge he smiled as he picked up his pen.
"Ninety-nine years in the San Quentin pen."
Ninety-nine years underneath that ground.
I can't forget the day I shot my woman down.

Come on; you gotta listen unto me.
Lay off that liquor and let that transfusion be.