On the wall of Inspector Drebbin's home in The Naked Gun 33 1/3: The Final Insult are portraits of David Crockett and (probably) Sam Houston, both adopted Texans. Why? The writers and directors are from Wisconsin.
Probably because David Zucker, the film's screenwriter and producer, is a huge Alamo buff, the battle in which Crockett died and during which Houston was Commander in Chief in Texas. Says Zucker himself:
In all of my movies you will see a reference to Davy Crockett. His picture hangs on the wall of most of my movies, but that’s just a coincidence having to do with my bringing the picture to the set and having the grips hang it prominently on a wall.
In fact, it's been Zucker's lifelong dream to make a Crockett bio pic. You can read more about it in this LA Times article and about his desire for a world class Alamo museum in this My SA article. Zucker also cameoed as Crockett in Naked Gun 2 1/2. That's him firing a musket around 0:35 here: