LITTLE FALLS — After a central Minnesota man repeatedly shot a teen who entered his home, he dragged the boy’s bloodied body into a basement workshop, authorities say, sat down — and waited.

When another teen began descending the stairway minutes later, Byron Smith fired again. The girl tumbled down the stairs and he shot her some more, including what he allegedly called “a good, clean finishing shot” into her head as she gasped for air, according to a criminal complaint.

It was Thanksgiving Day, 2012, and Smith, 65, left the teens’ bodies in his basement overnight before asking a neighbor to call police, the complaint said.

Smith, of Little Falls, claims he was defending himself. Though the teens were unarmed, he told police he’d been burglarized before and feared they had a weapon. He faces two counts of premeditated, first-degree murder in a case that rocked this quiet city of about 8,000 and stirred debate about just how far a person can go to protect one’s home from a potential threat.

On Monday, attorneys will begin selecting jurors to decide whether Smith acted reasonably when he shot Nick Brady, 17, and Haile Kifer, 18, or whether his actions amounted to a cold-blooded, calculated execution.