The rabid werepires were thirsty for some premium human blood.
Although there was plenty of premium blood available, it was a bad idea to kidnap random human beings in public places.
Master Alexis came up with the brilliant idea to make use of the illegal blood transactions that happened in Dominion almost every day.
A lot of human beings decided to earn money by selling their blood. Premium blood was rated at a higher price, so there were increasingly more and more young blood sellers.
Considering that it was an illegal activity, naturally, the brokers and the human beings were both very secretive about the when and where to conduct such transactions. Even if they both disappeared, so what?
They would at most be reported as missing people. After some time, the search would be concluded and life went on without further disturbances.
Master Alexis entrusted Lloyd with a very important mission.