Michelle,
With friends like these you don't need enemies.
"So now he's asking me to lie for him because if the insurance and police finds out that he lied he could get into serious trouble" - What about you? If the police find out you lied then you're the one in serious trouble.
The fact that you are having doubts tells me you already know the answer to your question. Tell the truth. It's not only the right thing to do it will make you feel a lot better about yourself.
No you should not lie.
Your "friend" chose to lie. He chose to commit 2 crimes - 1. lying to the police officer ( a false police report) and lying to the insurance company (insurance fraud).
Now your "friend" is asking you to lie. He wants you to commit a crime too.
Your insurance will pay for the injuries. It's the same as if your "friend" and his 2 buddies took money out of your pocket and putting into theirs. They did not care about your friendship when they decided to file false insurance claims against your policy. Apparently you and your friendship don't mean very much to them.
The guy who drove up later is known as a "jump in passenger". He was probably called by your buddy to come down and make a false insurance claim against you.
Some friend they are.
A claim for injuries means that they say that your negligent actions caused them physical injuries. As a result, they want your insurance policy to pay them for their medical bills, lost wages and pain and suffering.
If the insurance company can not resolve the claim with them....then they will sue you and expect you to lie in a court. The law suit will read: Friend do vs YOU (and your parents if it's their car and their car insurance). The law suit does not mention the insurance company. It's not against the company. It's against you and your parents (if it's their car).
How can it affect you (and your parents)? If they get a judgment in excess of your policy limits then they can take your personal assets.
At the very least, your insurance rates are going to skyrocket.
But hey, you lied and committed a crime and let your friends make some money off it. You can think about that each time you write a check for your increased insurance premium.
This bridge is already burned. Your "friend" did that when he lied and said you injured him. He torched it a second time when he allowed/called his buddy who was not even in the car so he could be a "jump in" passenger.
Your "friends" are defrauding you. They are stealing from you and asking you to help them do it.
If they asked you to help them rob a bank....would you do it? That's a crime too. Folks just don't think of insurance fraud as a crime. But it is. And what your "friends" are doing is Insurance Fraud. Especially the jump in passenger.
With "friends" like these....who needs enemies?
Perhaps it's time you re-evaluated this friendship. I'm sure you can find another friend who actually values your friendship.