Alvord Unified School District officials did not return a message left Thursday seeking comment. “A deranged homeless man broke into my daughter’s school bus this morning in the Alvord district,” a parent wrote on social media Wednesday. His rap sheet on the Riverside County Superior Court website fills a computer screen. The judge added one year for using a deadly weapon — a knife — during the robbery, Riverside County court records show. Alvord serves about 17,000 students at 23 schools in Riverside, Corona and parts of unincorporated Riverside County.