Heresy
Probably called: A new Religion.
a crime
The "Hindus" (not a name they necessarily call themselves) call their religion Sanatana Dharma.
you call " Islam" the religion
It depends on the religion.
Religion and politics? You might call that person an iconoclast, depending on their objects with the two systems. Myself, I use to different words to describe those aspects of myself: atheist (antitheist) and anarchist.
You are right that the name you call God is not important - as long as you speak of the same God - the One and Only God. BUT: God spoke to Moses and said that He will send other prophets with other messages over time. He spoke to Jesus after Moses. He spoke to Muhammad after Jesus, etc. So each new prophet that came brought a new message - an updated message. It is important to follow each new prophet as they come. Muhammad was the only prophet who said: "I am the last prophet". www.freequran.org
A person who commits a crime is known as a criminal.
Anything found at a crime scene is considered evidence.
Reincarnation, it is a belief of the Hindu religion
Yes.
To report a Federal crime, you first need to decide what type of crime it is, such as: Arson, Fraud, Gun crimes, Tax fraud, terrorism and so on. You may go to the Attorney General's office in person, call them, or go to their website, where they have different links based on the type of crime you're reporting. And of course, you can always call your local authorities and they can assist you.