A criminal who imitates the crimes of another; specifically, a criminal who commits the same crime, especially a highly-publicized one, that has just been or recently committed by someone else.
“It's nothing new. You're an imitator, an unoriginal copycat.”
copyright
(uncountable) The right by law to be the entity which determines who may publish, copy and distribute a piece of writing, music, picture or other work of authorship.
(countable) Such an exclusive right as it pertains to one or more specific works.