Accessory after the fact

a subordinate or supplementary part, object, or the like, used mainly for convenience, attractiveness, safety, etc., as a spotlight on an automobile or a lens cover on a camera.
an article or set of articles of dress, as gloves, earrings, or a scarf, that adds completeness, convenience, attractiveness, etc., to one’s basic outfit.
law.

also called accessory before the fact. a person who, though not present during the commission of a felony, is guilty of having aided and abetted another, who committed the felony.
also called accessory after the fact. a person who knowingly conceals or -ssists another who has committed a felony.
compare (def 9b).

anatomy, .
contributing to a general effect; supplementary; subsidiary.
law. giving aid as an accessory.
petrography. (of a mineral) being present in small amounts in a rock and having no bearing on the cl-ssification of the rock, as zircon in granite.
noun (pl) -ries
a supplementary part or object, as of a car, appliance, etc
(often pl) a small accompanying item of dress, esp of women’s dress
a person who incites someone to commit a crime or -ssists the perpetrator of a crime, either before or during its commission
adjective
supplementary; additional; subordinate
-ssisting in or having knowledge of an act, esp a crime
n.

also accessary, early 15c. as a legal term in the criminal sense of “one aiding in a crime;” also “that which is subordinate to something else,” from late latin accessorius, from accessor, agent noun from accedere (see access (n.)). attested from 1896 as “woman’s smaller articles of dress,” hence accessorize.
adj.

1550s, “subordinate,” from late latin accessorius, from accessor, agent noun from accedere (see access (n.)). meaning “aiding in crime” is from c.1600.

accessory ac·ces·so·ry (āk-sěs’ə-rē)
adj.

having a secondary, supplementary, or subordinate function.

of, relating to, or being a body part, such as a gland, nerve, or muscle, that is anatomically auxiliary.