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An employee in the McKinney Independent School District was arrested on Monday after police found drugs in the employee’s vehicle. What we know: McKinney ISD said police discovered the narcotics at McKinney Boyd High School on Monday during a routine safety sweep by local law enforcement. A drug-detection dog alerted on the employee’s vehicle. Officers searched the vehicle and then arrested the employee. What we don't know: Police have not yet released the employee’s name or said what charges he or she is facing. Dig deeper: McKinney ISD said the employee is a first-year employee who went through the standard hiring process and passed background checks. The employee was placed on leave pending the outcome of an investigation. The State Board of Educator Certification was also notified. What they're saying: "This situation is unexpected and deeply disappointing, but we remain committed to transparency and to maintaining a safe environment for our students," McKinney ISD said in a letter to parents. "We understand that news like this can be concerning, and we want to reassure you that we will continue to follow all district procedures and work closely with law enforcement as they conduct their investigation."