Q:

Was Pavel Checkov inappropriately unpunished for sexual assualt in Star Trek?

In Star Trek 'Day of the Dove', the emotions of the crew were somewhat influenced by an alien presence. They weren't under total or near total control like in 'And the Children Shall Lead'.
It seems that Pavel, who had been influenced to feel more hostile towards Klingons, sexually assaulted a Klingon woman.

Catching him in the act of what could've been much worse, Capt. Kirk slapped Pavel with an open hand. Spock then defended Pavel, saying that it wasn't really his fault. Kirk looked at Pavel, who had fallen down limp upon being slapped, and exclaimed "what have I done?". 
Kirk proceeded to yell at the Klingon woman, then grabbed her by the arm and handed her to Spock. He then carried Pavel in his arms.

Is this normal? 
Wouldn't sexual assault be handled more seriously on a military vessel? Even if someone were drunk or under the influence of drugs, is it normal that their actions would be immediately dismissed like this?

A:

There's two things at work here

Chekov was clearly "under the influence". Since his actions were not controlled, they can be considered involuntary. Note that earlier in the episode he tried to kill the Klingons because of an imaginary sibling's death.

KIRK: Chekov!
SPOCK: Jim, he's not responsible.
TOS: Day of the Dove

Klingon women would generally consider a physical attack to be a sexual overture. No doubt she was offended and shocked at the time but, on reflection she might be either amused or simply find the whole thing humiliating. Neither of those are liable to result in a formal complaint.

B'ETOR: You've done it, Soran.
(Soran punches B'Etor)
B'ETOR: Wait! ...I hope for your sake you were initiating a mating
ritual.
Star Trek: Generations

