Any corrections welcome =)

The strum pattern and chord progression is simple, just listen to the song and play 
along till you get the rhythm. There's a mute/thumb slap technique you can apply to keep the 
flow if you're playing solo.

Standard tuning
Capo 2nd fret

For the verses, this is the strum pattern and tablature:
(V down strum, ^ up strum, X slap)

V V   ^ V V   ^ V V   ^ V V V V
E----------------------------------|
B----------------------------------|
G----------------------------------|
D--2-2---2-2-2---2-2-2---2-2-2-----|
A--2-2---2-2-2---2-2-2---2-2-2-2-2-|
E------X-------X-------X-----------|
   Em (022000@1)  Em (022000@1)    Em (022000@1)    Em (022000@1)  Em7

Em (022000@1)                                 Em7
Well I met Sierra at the casino bar,
Em (022000@1)                                               Em7
And she said, "I have travelled on my way too far"
Em (022000@1)                                 Em7
Well hey Sierra, let me pick up your tab,
Em (022000@1)                                                           Em7
She said, "I got something to tell you boy, just don't get mad,
AAnd (x02220@1)I hate saying this but it was so much fun,
EmOh (022000@1)I killed a woman back in 1991"

(Bridge)
Em Em7

G (320003@1)        C (x32010@1)            Em (022000@1)    CSierra (x32010@1)the serial killer, Sierra
G (320003@1)        C (x32010@1)            Em (022000@1)    CSierra (x32010@1)the serial killer, Sierra