A shop lifter or someone looking for the "five finger discount."
you call the police.
Notverynicean
A person who steals from others is typically referred to as a robber or thief.
A thief or dishonest person is commonly referred to as a "criminal" or "fraudster."
ANODE
A lady thief in Tamil can be referred to as "திருட்டுப் பெண்" (thiruttu pen).
husband thief
a rubber bandit
a thief
Answer The answer to your question is what's in your heart? If you wish to call him a thief then do so to his/ her face, and if he or she don't like it, they can always leave.
Thoughtless, inconsiderate spring to mind.
They would be a thief.