Re: Headshots
Yes this can happen that you will get a head shot hit marker(Amber/golden coloured) and the opponent survives. I don't really play as the specialists but was always under the impression you needed two shots to the head on a heavy for example who has more health. I think it's something to do with necessary damage limitations on the weapons even for head shots. It depends on the weapon used and the opponents health. You have so many officers running around with buffs ensuring you will need two shots on most, also bare in mind assault has an individual health buff. As the heavy with a TL50 I can tell you that one shot in the head will not defeat anyone and even with the sentry you'll need more than one of those shots to connect with the head.
@Sati_Sati is a legend with stats. Got any stats for this one?