I think my dad has committed suicide...help?

this is not a joke question first off. My dad has been depressed lately because he got divorced from my mom after 22 years and 6 kids. He drinks a lot and my mom has been soaking up most of his money threw child care etc. He has been talking a lot lately about giving up in life and ending it all. Last week my dads girlfriend got in a fight with him and yesterday my dad didnt go to work and he's not at his home. His work hasnt seen him for 2 days and he's never missed work. What should I think??