The H'San Natall used the anti-alien group known as the Veil as their front when it comes to discrediting the Teen Titans and capturing them. One of their goals involved killing Scorcher of Dark Nemesis (who was also a human/H'San Natall) and framing Risk.
The H'San Natall relied on the anti-alien group, the Veil, as a disguise when targeting the Teen Titans for discredit and capture. Their goal included eliminating Scorcher of Dark Nemesis, who was also human/H'San Natall, and then falsely accusing Risk.