The 6-year-old who shot and injured his first grade teacher at an elementary school in Virginia in January will not be charged, but a prosecutor said that he was still deciding whether others could face criminal charges.

The boy shot the 25-year-old teacher once with a handgun in a classroom at Richneck Elementary School in Newport News about 2 p.m. on Jan. 6, leaving her with “life-threatening” injuries and renewing calls for restrictions to keep guns out of the hands of young people.

The Commonwealth attorney, Howard E. Gwynn, told NBC News on Wednesday that a child that young would not understand the legal system. The “prospect that a 6-year-old can stand trial is problematic,” he said.

He did not respond to repeated calls and an email requesting comment on Thursday.

The teacher, Abigail Zwerner, was in the middle of a routine lesson in her first grade classroom when, police said, the boy pulled out the gun, aimed it at her and fired.