Certainly they might, and they can, and will, be charged with it.
Yes
Special deterrence means that, if a person commit a crime,punishmentwill be apply on to that individual so that person don't commit a crime again.
A Pardon.
The presidential action of forgiving a person convicted of a crime is referred to as a pardon. Many times a president will pardon several people on his last day in office.
Murder.
Yes, it is possible.
A person who commits a crime is known as a criminal.
The president's power to grant pardons is found in the US. A pardon cancels the sentence and grants the person forgiveness for the crime.
If you were with a person who committed the crime, you are an accessory to a crime. (There are exceptions. It depends on what you mean by the word with. If you were with a person and totally unaware he was going to commit a crime and did nothing to participate in the crime, there may be an exception. I know of one case where a woman discovered she was with a drug dealer. She took her stuff and walked to the bus station and caught a bus. The law left her alone.) It depends on what you knew and when you knew it and what you did about it.
The president's power to release a person from the punishment or legal consequences of a crime is through the use of a pardon. A presidential pardon is a legal forgiveness of a crime and can be granted to individuals who have been convicted of federal offenses.
Then you did not commit a crime. I assume you mean, "What do you do if you are charged with a crime you did not commit?" The answer is, "You get a lawyer."
He was charged with Rape, convicted and spent 29 years in prison, but DNA proved he did not do it and exonerated him, and he was released with a full pardon.