Title: Invisible Protector (or A Not So Good Daddy)

Author: Seer M. Anno

Fandom: Cold Case

Genre: AU

Disclaimer: I do not own anything in this fandom except the story below.

Rating: PG-15

Warnings: Character death (of course), child (teenage) abuse, OOCness

Summary: The team reopens a case which is about the death of a teacher in 2000. His students think he was a good teacher. But apparently some people, especially his adopted son, know better.

A/N: Hello, new fandom! This is my first CC story, so please be gentle :D I'm also not an American (really want to see what Philly look like), so forgive me for not using American slang words and the lack of the detectives' own stories. Title is taken from ArethaHelena's unfinished Tintin fic, and is based on my own teacher.

Invisible Protector

Cold Case

Seer M. Anno

PROLOGUE

"Good afternoon, Mr. Sullivan," a cold, mocking voice said.

The brunette teen staggered in, and was greeted by his friends' laughs. He panted for breath before looked up at the person who had said that.

"Have no mommy to wake you up, heh, retard?" someone shouted at him.

Augustin Sullivan, the late teen, didn't answer although he could feel his tan face grew hotter. He merely huffed before plopped onto his chair. The teacher smiled coldly at him and told the students to be quiet. Augustin stared at the teacher.

He'll hit me again.

The teacher smirked. Augustin, reflexively, cowered in fear. The teacher was telling them the story about when he was in a gym and fought someone over a small feud. He was standing next to Augustin as he began the fighting scene.

The teacher's hand 'accidentally' swung and hit Augustin's bruise-covered shoulder, hard enough to make the teen gasp. "Ow!"

He didn't even look at him. The teacher continued the story as if nothing happened and hit some of the boys in a form of joke, but it didn't seem as hurtful as the hit he had delivered to Augustin's body.

Augustin huffed and closed his eyes, trying to numb his beaten body and listening to the teacher's ridiculous story at the same time.

A shock came to Augustin's house a month later.

Because, on December 20th, 2000, Trenton Carter, his teacher, his adoptive father, was found dead in an alley of a nearby casino.

So? Whatcha think? :D