[TheOldLady]

Scumbags! Ever looked the definition of a “Scumbag?”

scum·bag (skŭm′băg′)
n.
1. Slang A person regarded as despicable.
2. Vulgar Slang A condom, especially one that has been used.

Definition #1 would apply to the sadistic coward who shot the puppy.

Although I'm thinking that perhaps Definition #2 does too.

[Moonman62]

A Cleveland family has been left devastated after an officer shot and killed their beloved one-year-old golden retriever as he was on a leash in the family’s backyard.

...

Dogs shouldn’t be tethered.

http://www.humanesociety.org/issues/chaining_tethering/facts/chaining_tethering_facts.html