II just found out my license is suspended. According to the dmv it's was failure to appear for moving violation i never received

Mr. Finnecy is correct. Get a copy of ticket an dI suggest you get an attorney to deal with this as your license is suspended.

Speeding?

My coll argues are correct. This can be a serious as you were going 40 mph over the speed limit. This makes you ineligible for traffic school. Fine...

Write letter expressing exactly what you stated in thi9s question.

All of my colleagues are correct with their responses. It is up to you if you want to fight it

Could a speeding ticket be contested if a radar gun is supposedly used but the unit number and result are not included?

This is probably a pacing ticket with his vehicle (along with visual estimation). Your ticket will not be dismissed for the reasons you stated

A court appearance is necessary but yourself or an attorney to enter a plea. You better get an arraignment date, otherwise you are facing a...

Stays?

You might be able to qualify for house arrest with a scram bracelet.

What do I do with a citation due to a child supposedly not having seatbelt on and I was a passenger ?

Mr. Quintero has laid it all out. Get an attorney and fight it.

Can I become a public defender investigator since my felony forgery charge was reduced to a misdemeanor then dismissed by 17(b)?

You can certainly try. Do not fail to indicate this offense when applying for license.

What do I do when. The police have my r.v towed the towing company never put the lien sale in the newspaper

I'm not sure what you want to do. Mr. Hill has made a good suggestion. Do you want your RV back?