This would include principals and accessories before the fact; depending on the jurisdiction and the facts of the case it might also include conspirators (see under conspiracy ...
http://encyclopedia2.thefreedictionary.com/accessories

Accessories also help express individual tastes and preferences. Major accessories, however, should not be afterthoughts; they should be planned as the design evolves.
http://aggie-horticulture.tamu.edu/extension/homelandscape/a ...

for accessories and components, we can also supply many items not listed
http://campervanaccessories.com

Microsoft Zune accessories also include Zune home chargers, car chargers and USB chargers to keep your Zune MP3 player powered and ready to go.
http://www.daydeal.com/home.php?cat=3101

Also see our New Accessories Category for the latest accessories New Products > New Accessories
http://yhst-62361108026679.stores.yahoo.net/accessories.html