Can I sue someone for attempted murder with a firearm?

You can sue anyone for anything at anytime. The real question is can you win anything. You’ll have to talk to a local attorney for an answer.

Typically anyone entering a corrections facility can be searched.

Should I take should I take my case to trial?

Only someone who has carefully reviewed your case can provide the advice you are seeking.

N400?

Yes. Mention them and explain that you don’t remember all of the information and can’t obtain it from the courts.

What do I do after receiving a letter from Sherrif’s Office notifying me a complaint has been filed against me?

Sounds like it is time to get an attorney.

Maybe and maybe not. It depends on several factors. Have an attorney look closely at the warrant and application.

If an 28yo male has a baby with an 17 yo female, what can he be charged with?

The age of consent is 16. As long as there was no sexual conduct prior to her turning 16, there is no crime described here unless he was in a...

If a 16 now 17 got pregnant by a man in his late 20s is the only way for him to go to jail if her mother presses charges?

You haven't described a crime, so nobody will be putting anyone in jail.

Will she get deported?

It seems like she definitely could be taken into ice custody. Would be wise to get an immigration attorney involved.

Can Canada immigration officer know if my American green card is not valid ?

This is a question of Canadian law and should be addressed to a Canadian immigration attorney.