Giving this a try...

Stone Guardian - Danielle Monsch

Excerpt:

 

Dear God…

 

The rookie behind him plowed hard into his back. It didn’t knock him over, but it shook him out of the daze.

 

Training took over, and as he drew his gun and began firing, he catalogued the monsters descriptions. Humanoid features, heights 6’5” to 7’5”, built like weightlifters. Grey-green skin, with overlarge heads and features misshapen like they’d been pummeled thirteen rounds in the ring. Jaws shoved forward with tusks protruding upwards like ivory knives.

 

They were every nightmare had by every little boy made flesh.