What is the law if a semi-dump truck causes an accident, totals the car and seriously hurts a person?

Wednesday morning, my son an a co-worker was traveling in the passing lane. The co-worker was driving the car. There was a semi dump truck ahead of them in the slow lane. The truck driver suddenly change to the passing lane heading for the turn around for the law. The co-driver turn left to miss the semi dump truck. The front right of the car hit the semi dump truck. This caused the car to flip several times. The co-worker was able to get out of the car. the parimedics had to cut my son out of the car. They life flighted him to the nearest hospital. My son had dislocated his hip and broke his pelvic. He has a deep cut going from middle of his forehead, down right side of his nose. It continue down to his lips. His facial structure above his jaw are fractured. His second forehead bone is touching his brain. The is an air pocket there. His left ankle is broken. He was life-flighted to another hospital to do the hip and pelvic operation. He is in bad shape, cause someone couldn't slow.

You better hope everything is in order on that commercial vehicle or its curtains for you.

I need to know if state laws are the same as federal laws when it come to semi- truck accidents?

The accident was in Navada.
then where can i find the laws to check them?

Depends on the law you're concerned with. Federal law, by definition, is the law of the land. States can make more restrictive laws or require harsher penalties, but cannot lower the penalties from what the federal law requires. Most states stick pretty close to Federal law when dealing with Interstate transportation.

To get the best advice, talk to an attorney who practicies in Nevada.