An elementary school special education teacher assistant has been arrested for pinching the armpit of a non-verbal student with Down syndrome, according to an arrest report. The Clark County School District Police Department arrested Lisa Harris, 65, on Monday in connection with the alleged incident Friday at Perkins Elementary School in North Las Vegas. She faces one felony charge of child abuse or neglect and one gross misdemeanor charge of abuse of a vulnerable person, online court records show. Harris has been a school district employee since October 2000, the district said in an email. A witness at Perkins Elementary told police she saw Harris approach the student in the school’s cafeteria around 2:10 p.m. Friday and use two fingers to pinch him in his right armpit, the report said. Video surveillance from inside the cafeteria appeared to show Harris lean in close to the special needs student and reach under his right armpit area, according to the report.…