How to get away with murder:
Wear an all spadex suit.
Put bags or hair nets (ones the nurses use in surgery) on your shoes.
Shave your head, or put a hair net over it.
Put fingers in acid to destroy fingerprints, or wear gloves.
Kill victim by knocking them out and injecting them with an empty needle filled with air so their vein will explode.
Rent a boat and go out in the middle of the Atlantic Ocean.
Dump the body with weights into the ocean, and you're done!
Pretty sure CSI wouldn't find you.