An employee has worked for a company for 15 years. One day the employee arrives to work 15 minutes late and under the influence of alcohol. The company has a zero tolerance policy for workplace drug and alcohol use. The employer fires the employee on the spot. The employee is at-will.

Can the employee sue for wrongful discharge?

Yes, because did not go through an HR process

No, because he violated company policy

No, because he is an at-will employee

Yes, because he as intoxicated