Poor little lady, amazing to see you shot this, I also shot this once, but just the nymph
They use the long proboscis to inject a lethal saliva that liquefies the insides of the prey, which are then sucked out. The legs of some of these bugs are covered in tiny hairs that serve to make them sticky to hold onto their prey while they feed.
source: en.wikipedia.org/wiki/Reduviidae