CHICAGO (CBS) — A mother is suing the Chicago Public Schools, after she says her first-grader was handcuffed by a school security guard.

As WBBM Newsradio’s Michele Fiore reports, the Chicago Tribune says LaShanda Smith alleges her son has suffered both “permanent” and “personal” injury following what happened in March 2010.

LISTEN: WBBM Newsradio’s Michele Fiore reports

It was then that a security guard at Carver Primary School, 901 E. 133rd Pl., stepped in to intercede with an unexplained incident on campus.

Smith says the security guard handcuffed her first grade son and left his arms locked – for one full hour, the Tribune reported.

Smith is seeking more than $100,000 in damages. CPS officials declined to comment to the Tribune on the lawsuit.