Translation of "Abusing" in Japanese

You are abusing your authority.

それは越権行為だ。

The section chief seems to like abusing his authority.

課長は職権を乱用することが好きなようだね。

- He was arrested for abusing public funds.
- He was arrested for misappropriating public funds.

彼は公金を悪用したかどで逮捕された。