The True Truth will set you free

'Any alcoholic beverages tonight, ma'm?'
'I had one beer,' I said, looking at him straight in the eye and in an 'oh shit, you caught me' kind of tone.
He said he stopped me because I was speeding, something I find impossible to do in my crummy old car, which barely goes faster than 55 mph. Besides, I had just pulled out of my parking spot about two blocks away.
'Are you aware there is absolutely no tolerance for drinking and driving?'
'No, sir. I wasn't aware you couldn't drink one beer and then drive a short distance back home,' still looking at him straight in the eye, which (don't tell my mother about this) is my favourite lying technique.
'You were going far too fast.'
'I’m sorry, I might have rushed because it's late and I have to go to work in the morning. Mind you, all those other cars are going pretty fast,' I said, rather cheekily.
'Where do you live?,’ he asked, staring at my license, which, by the way, has my address on it.
'Colonia Terminal.'
'Well, I’ll have to give you a ticket for speeding, and you’ll have to get a dictamen médico in a place that’s really far away from where you live. The ticket for drinking and driving is a lot of money,' he said, obviously trying to scare me into bribing him.
'That's fine by me, sir.'
He made a long pause for dramatic effect, and then said, 'Are you sure you only had one beer?'
'Positive.'
'Because, if you tell me the Truth, you can go home.'
'I only had one beer.'