retaliate against employee

Can My Employer Penalize Me for Alerting the Company to Possible Age Discrimination?

I felt that my employer was descriminating against me by not giving me a promotion after working in my same position for 10 years. I'm over 60 years of age and a man 20 years my junior was given the position instead. I complained to the owners of the company and found myself demoted to an even lower place on the totem pole three weeks later. It seems I'm being retaliated against.