From some Twilight wiki:
Angela Weber is one of Bella's classmates from Forks High School. She is described as kind, shy, and somewhat insightful. She likes to give space to others, and this characteristic is very much appreciated by Bella. She plays a minor role in Twilight, but after Bella's depression in New Moon, they become good friends. She is portrayed as one of the most decent human characters in the series and Bella's best human friend.
Doesn't sound like a lie detector at all.
100% sure TKOK is a scum rolecop and full of shit.
I'll make another post for him to "detect" in a second.