The "White Boy Posse" had a problem. One of their members had left the gang. The leader saw this as a betrayal - so he ordered the assassination of his ex-member.
On the morning of the 12th, the assassination squad rang Lorry's doorbell. When she answered the door, they shot and killed her.
You may have noticed that she doesn't look much like an ex-member of the "White Boy Posse". For one thing, she's not white. Or a boy. Now, the White Boy Posse leader who ordered the hit certainly wasn't averse to violence against women; he'd beaten his ex-girlfriend when she tried to leave, for instance. But in this case, it was unintentional - the White Boy Posse simply got the wrong address.