When Cale realized that what Alice was saying was not entirely true, he looked into her memories to find out the truth. Alice was vampirized by Arus, the clan head before Soleria, the current head of the Vampire Clan.
Because of Arus's peculiar perverse tastes, it had become his daily routine to drink people's blood and kill or torture them. For this reason, Ivan had made a special deal with Igor and asked him to find human victims for him.
Alice was one of them. Her parents had sold their daughter to Ivan for money. Ivan handed Alice over to Arus along with the other captured people. Arus was a firm believer in pure blood, so whether someone was a hybrid or a vampire, he wanted them dead without thinking.