Her parents couldn't take care of her, they only adopted Laurie and Lia was sent to a foster home after the mom died

The cast of Fox Magazine - 1997 includes: Laurie Dhue as Host Diane Foster as herself Michael Straka as Reporter

He is a police officer that got killed in the line of duty by the Black Liberation Army. He was on duty with Gregory Foster. There is now a school in Staten Island, New York named after him.

Laurie Halse Anderson's birth name is Laurie Beth Halse.

If, by "Laurie's" you mean Laurie owns something, then it is a possessive noun.