stolen credit card issues..please help

i have a friend who needs legal advice.he's in the US right now.ginamit nung brother nya yung credit card nya without his knowledge while his in the US.what he did nagpainvestigate sya sa credit card company para malaman nya kung sino ang gumawa.
while the investigation, inamin nung brother nya sa kanya na cia ang nagstole or gumamit nung credit card.

QUESTION IS:pwede ba ipatigil nung friend ko yung investigation?kase ayaw nung friend ko makasuhan yung brother nya.

***if ever madiscover nung credit card company na yung brother nya ang gumawa or ang suspect, pwede pa rin ba kasuhan nung credit card company yung brother nya kahet ayaw nya kasuhan yung brother nya?

ang gusto kase nung friend ko wag makasuhan yung kapatid nya at babayaran na lang nya yung credit card.

**nagwoworry kase yung friend ko na baka ituloy nung credit card company ang pagfile ng case against his brother if ever madiscover nila na yung brother nya ang nagstole nung credit card nya.

he can simply inform the credit card company that he is withdrawing his complaint. the credit card company will not pursue as long as they are paid.

thanks a lot..