kcfromaustcrime, Another new onto MtTBR, Pine Creek by Kamille Roach:
https://www.austcrimefiction.org/book/pine-creek
On a bitter winter’s night in Pine Creek, 1989, central New South Wales, 14-year-old city boy Alec tells his mother a secret before he goes to bed. It’s the last time she will see him alive.