Is there an easy way to record a call?

audioacrobat.com

Be careful. That's illegal in many states.

Yeah its illegal without permission of the other party.

If you are in law enforcement then as long as one party (the officer) is aware that there is a recording in progress then it's absolutely legal regardless if the other person does not know. Also, to make it legal, just state that a conversation may or may not be recorded at the beginning of the conversation, but in many states it's still admissable if at least one person in the conversation knows there's a recording going on.

If the recorder is a party to the call it is legal to record the call in the vast majority of states