An Escondido High School teacher who allegedly engaged in sex acts with two underage students pleaded not guilty Tuesday to more than two dozen felony counts. Kyiri Tisdale, 31, was arrested Friday on suspicion of multiple sex crimes involving two alleged victims who have since graduated, according to the Escondido Union High School District. The Escondido Police Department says it first received a report concerning Tisdale last month. Tisdale faces nearly 20 years in state prison if convicted of all 26 charges filed against him, which include 22 counts of unlawful sexual intercourse with a minor. MORE: https://www.cbs8.com/article/news/local/escondido-teacher-pleads-not-guilty-to-sex-charges/509-fb813ed3-3621-47f6-9722-2c15c19dae94