Geeze, talk about variations on themes. The version I learned goes laong this wise:

Twinkle, twinkle, little star
And along come Brady in his ee-lectric car
Big mean look, in his right eye
Bound to kill somebody just to see him die --
He'd been on the job too long!

Duncan, Duncan, he was tending bar
When along came Brady in his shiny star
Said "Come along, Duncan, you're under arrest!"
And Duncan put a bullet right through Brady's chest.
He'd been on the job too long.

"Oh, Brady," said Duncan, "You know you done wrong!
Come inta my saloon while the games were goin' on
Broke down my window, broke down my door --
That why I left you dead on my barroom floor.
You been on the job too long!"

When Mrs Brady heard King Brady was gone
She up and started singing his mourning song.
Runnin' round town, and crying up and down
In an old Mother Hubbard and a blue night-gown
She'd been on the job too long.

It's all over town, now, King Brady is dead
I called the undertaker, and here's what he said:
"Roll out your hearses, your rubber-tired hacks,
Takin' twelve men to the graveyard, bringing eleven back!"
He's been on the job too long.

Regards,

A