Cory Finley's 'Thoroughbreds' is a delectably twisted mean-girls noir
“Empathy isn’t your strong suit.” That’s Amanda (Olivia Cooke) addressing her friend Lily (Anya Taylor-Joy) in the sleek, withering psychological chiller “Thoroughbreds.” By that point her criticism will strike you as either laughably redundant or outrageously hypocritical, since Amanda is, if...