The Etude

The interrogation room, affectionately known as "The Box," was designed to make people feel small. The walls were painted a peeling, institutional green. The air was stagnant. The two-way mirror on the far wall was a constant, unblinking eye.

Detective Silas hated The Box. He had spent twenty years in this room, listening to lies, pleas, and the wet sniffling of regret.

When he walked in, he expected to find a hysterical teenager. He expected tears. He expected hyperventilation.

Instead, he found Mei Lin doing her calculus homework.

She was handcuffed to the steel table by her left wrist. Her right hand moved a pencil across a worksheet with fluid, rhythmic precision. She didn't look up when the heavy door slammed shut.

Silas pulled out the metal chair opposite her and sat down. He dropped a file folder onto the table. It landed with a heavy *thud*.

Mei finished the equation she was working on, dotted a decimal point, and then set the pencil down. She looked up. Her eyes were dark, intelligent, and devoid of fear.

"Detective," she acknowledged.

"Mei Lin," Silas said, his voice a low rumble of gravel and smoke. "You're a cool customer for someone who just bludgeoned her stepfather to death."

"Panic is inefficient," Mei replied. "It wastes oxygen."

Silas leaned back, studying her. She was tiny. Maybe ninety pounds soaking wet. Her wrists looked like glass stems.

"Your stepfather," Silas said, opening the file. "Arthur Zhang. Two hundred and ten pounds. A known gambler. A known drinker. A man with a temper."

"He had a bad night," Mei said. "He came home angry. He started breaking things in the kitchen. My mother was crying. I told him to stop. He didn't."

"So you hit him?"

"I waited until he passed out on the sofa," Mei corrected. "Then I hit him."

"With a hammer."

"Yes."

"And then?"

"And then I dragged him to the bathtub to contain the fluids," Mei said. "I cleaned the living room with bleach and vinegar. I packed my bag. I came here."

Silas narrowed his eyes. "You dragged him. A two-hundred-pound dead weight. You dragged him down a hallway and lifted him into a claw-foot tub?"

"It is a matter of leverage, Detective," Mei said, her tone clinical, as if she were explaining music theory. "If you hook the arms and keep your center of gravity low, the weight is manageable. The body is just an object. Physics does not care about morality."

Silas watched her hands. They were resting on the table, clasped together.

"Physics might not," Silas said softly. "But physiology does."