Norwalk police have charged Richard Lovallo, a 64-year-old middle school substitute teacher, with sending inappropriate messages to students. Norwalk Police Department/Contributed.

Richard Lovallo, 64, of Stamford was arrested Friday and charged with two counts each of risk of injury to a minor and harmful communication with a minor, according to the Norwalk Police Department.

Richard Lovallo, 64, of Stamford, was arrested on Friday and charged with two counts of risk of injury/impairing the morals of a minor and two counts of harmful communication with a minor.