Which preposition to use with abet

in Occurrences 8%

We tried one of the gentlemen for aiding and abetting in the loss of a government horse, and for having something to do with the mysterious disappearance of a Colt's pistol.

with Occurrences 3%

The boys do all the hard work, and the personnel of the ambulance aids and abets with great good humor, though it is very upsetting.

Which preposition to use with  abet