Most derringer safeties are what is between yer ears...
I won’t carry a derringer because of this very type of incident...
A holstered firearm, in my opinion (and I am sure to catch a lot of caca for this, but hey), is a more credible, and safe method of carrying as far as I am concerned...
In Texas, until an open carry provision is passed, we’ll have to canceal carry and put up with the weather extremes until that time...
It is unfortunate someone got hurt, and hopefully the permit holder will re-think their choice of firearm (and carry method) in the future...
The only safety on any Derringer of which I am aware is the semi-cocked position of the hammer. If dropped, the gun should not fire with the hammer in this position. Obviously, this guy was carrying around a weapon either fully cocked or with the hammer resting on the firing pin. Stupid either way. But then, he also showed his intelligence with the weapon of choice anyway.
It's cheap and handy.
:)