What warning does Alice give Officer Thompson in the novel, The Agathas?

From the text:

‘You know, Officer Thompson,’ I say in my sweetest, deadliest voice. ‘You might think I am just some dumb teenage girl, but you’re going to be in for a rude awakening when we blow this case wide open and prove that something shady is going on in this town. And you better believe it’s all going to come down on your shoulders when that happens. You can kiss your pension goodbye’” (253-254).