A picture of a criminal is often referred to as a "mugshot." This term specifically denotes the photographic portrait taken after a person is arrested, typically showing their face and shoulders. Mugshots are used for identification purposes and may be released to the public or media.
Narc, snitch or rat.
If your brother is a criminal you should call the police and ask them what to do from there.
Aiding a criminal? Harboring a fugitive.
true
desperado
vilen
A Picture Framer
police
A picture on a wall could be a mural, a painting, a photograph. It depends on the picture.
It's "Criminal" vs. "Civil" justice, that's why. Not criminal/victim :-)
You would call them a Forensic Scientist.
A posed picture can be referred to as non-candid, or a portrait.