Harry wasn’t worried when the two Malfoy goons walked into his office, he had dealt with hired muscle before. An unavoidable consequence of investigating people’s dirty laundry, you know? He wasn’t concerned when Lucious Malfoy himself, the head of the largest crime family in the country, walked in behind them. All suave and debonair, his tailored suit and matching cane looking more expensive than the entire contents of the little office. He wasn’t even concerned when Malfoy told him he wasn’t there because Harry had helped put one of his lieutenants behind bars, smug bastard even had the balls to smirk.
He was supremely worried when Malfoy offered to hire him.
He needed someone outside the Ministry to investigate something for him. A simple internal matter, had been the words used, but Harry knew better. One of their guys had gotten hit and they wanted to find out whodunnit, likely hoping to pin the blame on someone in the Nott family. Anything to light the spark of open war between the two families.
He almost refused, an immediate no, they didn’t take jobs from mob bosses. Gangsters were trouble…but they needed the money. They hadn’t had a decent paying job in a while, suspicious spouses and jealous exes didn't pay the bills, and his partner had been missing for days….
So, that’s how Harry found himself in the middle of a hotel room on the other side of town, the room a mess, blood stains on the bed and far wall, the remnants of a vase shattered near the door. The body of one of Malfoy's men was still in the bathroom, head leaning awkwardly against the tub. He took a long drag on his cigarette and then froze, eyes catching an object at the base of the side table. Walking over, he bent down and sighed as he picked up the hair clip. The small diamonds of the clip had been marred by flecks of red. He knew this clip, he’d seen it almost every day for four years.
“Dammit Delacour,” he muttered to himself, “What have you gotten us into?”
TL;DR: Noir AU where Harry and Fleur are PI’s