Chlisa Grimes said she had no choice but to defend her son from bullying after reporting the bullying to the school more than 10 times, reported USA Today.
Grimes told CNN that administrators at Arsenal Technical High School in Indianapolis did not do enough to protect her son, Darnell 'Dynasty' Young, 17, who she said endured months of harassment.
'I do not promote violence - not at all - but what is a parent to do when she has done everything that she felt she was supposed to do ... at the school?' Grimes said. 'I did feel like there was nothing else left for me to do, but protect my child.
'I think that the self-protection device is what's making the news, but the big picture is that my child is not the only one who does not feel safe at our school.'
Young said he set the weapon off when he was surrounded by a group of 6 bullies threatening to beat him up for being gay.
'I got kicked out of school for me bringing the weapon to school, but I honestly don't think that that was fair,' he said.
'I didn't use it on nobody. ... All I did was raise it up in the air and went back to my class.'
School police officers arrested him soon after. The school is investigating the incident and Young is now facing expulsion.