If you are the type of person who is uncomfortable with the fact that your smartphone is tracking your location, along with your debit cards, credit cards, access control fob, Internet service provider, traffic cameras, toll booths, ATMs, Starbucks app, the EXIF data buried in your snapshots, and so forth, you've got one more thing to worry about: your cat.
I ran across this online article from Time last Friday. Essentially, cat hairs travel well, and are picked up and deposited by carriers--such as human beings--who transport those hairs from hither to yon. You can test cat hair DNA just like human hair. Your cat may be tagging the places you've been when his little hairballs are being deposited from your sweater onto someone else's couch. If your kitty's hair ends up at the scene of a serious crime, you could have some explaining to do.
Add "get rid of my cat" to the to-do list before embarking on a life of violent crime.