Which preposition to use with malfeasance

in Occurrences 5%

Provision is made for the removal of any county officer for non-feasance or malfeasance in office.

against Occurrences 1%

Charges of malfeasance against some of those now in office will devolve upon the Executive a rigid investigation into their extent and character, and will in due season claim my attention.

Which preposition to use with  malfeasance