“I got pulled over by a cop with Alzheimer’s. He said, ‘Do you know why I pulled you over?’”

When a police officer asks a driver “Do you know why I pulled you over?’, the police officer knows the answer to the question—or does he/she? This was posted on Twitter by Random Guy on January 31, 2012:
 
Larry the Cable Guy: “Pulled over by a cop with Alzheimer’s. He said ‘Do I know why I pulled you over?’ I said “yeah, you owe me 20 bucks.’”
 
“I got pulled over by a cop with Alzheimer’s. He tapped on my window and said ‘Do I know why I pulled you over?’...-Larry The Cableguy” was posted on Twitter by Tyler Rawles on June 15, 2013. The joke is probably from American stand-up comedian and actor Larry the Cable Guy.
   
   
Wikipedia: Larry the Cable Guy
Daniel Lawrence Whitney (born February 17, 1963), known professionally by his stage name Larry the Cable Guy, is an American stand-up comedian, actor, producer, singer and radio personality, with a career spanning over 30 years.

Twitter
Random Guy
@rmasters78
Larry the Cable Guy: “Pulled over by a cop with Alzheimer’s. He said ‘Do I know why I pulled you over?’ I said “yeah, you owe me 20 bucks.’”
10:14 PM · Jan 31, 2012 · Twitter Web Client
   
Twitter
Merlo
@frostytbird
Pulled over by a cop with Alzheimer’s “do I know why I pulled you over”? Tried not to laugh!!!
1:47 PM · Aug 29, 2012 · Twitter for iPhone
   
Twitter
Doug Hertz
@hertz_11
@peers_15 got pulled over by a cop with Alzheimer’s and he was like “Do I know why I pulled you over?”
1:42 PM · Mar 2, 2013 · Twitter for iPhone
   
Twitter
Tyler Rawles
@t_Raw777
I got pulled over by a cop with Alzheimer’s. He tapped on my window and said “Do I know why I pulled you over?”...
-Larry The Cableguy
8:16 PM · Jun 15, 2013 · Twitter for iPhone    
 
Twitter
Lamushka
@lemlust
Cop: “Do you know why I pulled you over?”
Guy: “No..?”
Cop: “Dammit!”
- A cop with Alzheimers
6:59 AM · Jan 27, 2016 · Twitter Web Client
 
Reddit—Jokes
Posted by u/the_space_monster September 29, 2017
“Son, do you know why I pulled you over?”
Cop with Alzheimer’s trying to play it cool.
   
Reddit—Jokes
Posted by u/Porter1213 July 22, 2019
I got pulled over by a cop with alzheimer’s.
He said, “Do you know why I pulled you over?”