Legal Question in Sexual Harassment in Missouri

Re: Does a police officer groping my buttox qualify as sexual harrassment?

Not exactly, I'd say, no. It 'qualifies' as something much more tangible and serious, namely "assault" (or, assault and battery). It's possible that it is in your state something else instead or as well, perhaps "sexual assault" or "indecent assault" or something else like that.

I think that in any state it is a crime. The sexual harassment claim you asked about is probably just a civil charge.

Frankly, it's an obvious outrage. If it bothers you, report it. Even if you don't get a conviction (or even a suspension), your report will probably get him in some trouble with his superiors (who will probably think it's true even if you couldn't prove it in court). Maybe if you talk directly to his superiors they will ask you or someone else to 'entrap' him (somehow) so they can get it on camera and really nail him; I don't know.

My suggestion is to use a lawyer; consult one before you take any steps (and do it soon) and also let the lawyer take the steps for you if that's what s/he thinks would be best. If you are in or near St. Louis, I'll suggest one to you.