Lewis Short
mălĕfactor (noun M) : id.
* An evildoer, malefactor (Plautin. and post-class.): malefactorem amitti satiu'st quam relinqui beneficum,i. e. it is better to let a malefactor go unpunished than to be ungrateful towards a benefactor,Plaut. Bacch. 3, 2, 11: ad vindictam malefactorum,Vulg. 1 Pet. 2, 14.
Charlton T. Lewis, Charles Short, A Latin Dictionary