I tried to imply that the cop knew that I would be recording our conversation. Not a phone conversation, but using the phone to record the conversation between cop and suspect. No cop should be upset with you collecting evidence. My point is, most folks carry a personal recording device on their cell phone. If confronted by the authorities, be super kind, respectful and compliant, and let the officer know that you're recording the conversation.New Jersey is a one-party-consent state. I don't know if these laws apply to just telephone calls or to personal conversations as well, but here's a list of which states allow recording with only one party's consent (it's actually most states):Recording somebody's conversations without knowledge is a crime in some (but to my knowledge not all) states/jurisdictions.Most cell phones have a function to record voice conversations (where you don't have to be talking into the phone). I wonder if they would get more upset if you said "One moment, please," turned on the recorder, then showed them their own policy.Well I'd carry a printed copy of the policy with me, preferably one with the Amtrak logo and URL at the bottom of the page, and politely present it to him/her with a statement like, "Well here's the current Amtrak policy from the website that I printed just before leaving home. Can you please point out to me or explain to me what section I'm violating?" Above all, remain calm and polite. Don't call them names, don't insist that they are wrong and you're right, or accuse them of anything, and certainly don't touch them or make an moves that could be considered threatening.The current policy is rather.. generous. I don't know how to approach a conductor with it though. I mean I would comply but in the back of my mind I'd always think "wait a second, I know more about this policy than you do?" I'd raise my eyebrow and wait until after the crew change to resume my photography, or move to a more public area like a sightseer. Nobody in their right mind would object in that car as long as it wasn't disturbing pax or crew.
If they get mad and/or refuse to discuss it or even read it, then just be sure to remember their name and comply with their request, regardless of how you feel about them being right or wrong. As soon as they've moved on, immediately write down their name, train #, car # (if you know it), date, time, nearest station, and a description of what you were doing, what was said by both of you. You can even ask around after the employee has moved on, if any fellow passengers would agree to be a witness.
When you get home, use that information to report them. Send a polite email/letter to Amtrak with that info and request that they please properly educate that employee on the photography policy. I don't recommend the phone, as you're more likely to get emotional and you're also relying on the person on the other end of the phone to get things right. With a printed letter or email, it can properly make it's way through the inter-offices of Amtrak to reach the offending employee's supervisor's.
http://www.aapsonline.org/judicial/telephone.htm
And, yes, in most states, only one person involved in a conversation needs to know the coversation is being recorded (anti wiretapping laws), but I don't think that even applies when not recording a phone call.