Employers can refuse to hire anyone for any cause. Just because you are qualified does not mean that they must hire you and nobody else.
If the charges are dismissed, it can be charged again if sufficient additional evidence is presented.
If the charges have been dismissed, yes. If the charges are pending, or have resulted in a conviction, no. Check with a local attorney to be sure.
Dismissed charges should have no impact on whether you can travel and return.
The case first has to be dismissed. Once the case has been dismissed it will be disposed of. In some cases it may not be on your record and in some cases it will say dismissed.
If your charges were DISMISSED before you went to trial, then your charges were simply dismissed. However if you went to trial, there is no such finding as "innocent," the only verdicts are 'guilty' and 'not guilty.'
Not necessarily. It can depend on the type of case. If a murderer's victim dies, they don't drop the charges against the person that murdered them, do they?
Assault and vandalism.
You would probably be charged with manslaughter because you killed someone, but you didn't intend to.
If it's determined not to be an accident, they could be charged with assault.
Assault and battery would be the basic charges.
No. The person making the call in Canada is charged for the call. The only 'variation' would be if the Canadian caller revered the charges.
Depending on the state and the crime...24 to 72 hours...after that you must be charged or released.