The Collaborative International Dictionary of English v.0.48:

Culpa \Cul"pa\ (k[u^]l"p[.a]), n. [L.] (Law)
   Negligence or fault, as distinguishable from dolus (deceit,
   fraud), which implies intent, culpa being imputable to defect
   of intellect, dolus to defect of heart. --Wharton.
   [1913 Webster]

Bouvier's Law Dictionary, Revised 6th Ed (1856):

CULPA. A fault committed without fraud, and this distinguishes it from
dolus, which is a trick to deceive. See Dolus.