It was about 2 p.m. on a Thursday in May when Mitch Carroll pulled up to an apartment building with teal trim in Madison County, Ind.

He was wearing jeans, a T-shirt and pristine white sneakers. But to the middle-aged woman who opened the door, it was obvious he was in law enforcement. He had a badge and a Glock 9 mm pistol at his waist.

“Hi, you Sharon?” Carroll asked.

“Yeah,” the woman replied.

“Sharon, I’m Mitch Carroll. I’m with the Madison County Prosecutor’s Office,” he said. “Deep breath. You’re not in trouble.”