Armed and Dangerous (S03E16)

After JESSIE PALERMO is shot at school, she is determined to uncover the source of the firearms in the hands of students. She reaches out to local gun maker CAVANAUGH, who is perplexed by the presence of untraceable weapons linked to his establishment. T.C. goes undercover posing as a substitute teacher, while Chris and Victor conduct a sting operation. Their investigation leads them to the supplier: KYLE CAVANAUGH, the factory owner's son and Erica, Jessie's best friend, is dating him. As Jessie grapples with her emotional recovery, Erica becomes increasingly absorbed in her relationship. In her quest for answers, Jessie uncovers a surprising truth about her shooter: school nerd JOSH TIMMONS, who acquired the gun to defend himself against bullies.