star wars - Is there any evidence to suggest that Aunt Beru and Uncle Owen were killed by Boba Fett and not the Storm Troopers?

There's a fan theory that it was possibly Boba Fett who killed Uncle Owen and Aunt Beru in A New Hope, instead of Storm Troopers, as Obi-Wan thought).

This is a big jump (that Obi Wan was wrong) — but listen to the reasons in favour of this idea:

• Boba Fett was reasonably close by at Mos Eisley with Jabba (according to Canon)


• Vader was clearly frustrated at how slow his men were going, and in The Empire Strikes Back we see the Empire resort to using Bounty Hunters to solve a problem.



• Storm Troopers have no reason to cover up the murdering of Jawas by making it look like Sand People attacked. Whereas a Bounty hunter would want to prevent other Bounty hunters from grabbing his prize.


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  In The Empire Strikes Back, Vader reprimands Boba Fett saying

  
  

  
  

  I want them alive - no disintegrations!

  
  

  
  

  This seems to be a hint that Boba Fett got it wrong last time.

  
  


• Who else have we seen disintegrated? The Jawas, Owen and Beru.


• Disintegration wouldn't happen by blaster fire or even a Lightsaber. It would take more, it would take burning the bodies.



• We know Fett has a weapon on his arm to easily burn a victim of his choosing.

My question is: Is there any evidence to suggest that Aunt Beru and Uncle Owen were killed by Boba Fett and not the Storm Troopers?

Answer

This theory has now been debunked in new Disney canon ("From a Certain Point of View" short story collection, "Added Muscle" by Paul Dini).

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  We find out who Fett "disintegrated" where Vader was concerned, and it was not Aunt Beru and Owen Lars - it was three rebels on Coruscant.

  
  

  
  

  ... I picked up trooper buzz that Vader was looking for a couple of runaway droids. Figured I’d collect the bounty and square myself with the headman at the same time. He’s still got a mad on over those rebel spies I crisped on Coruscant. Idiots came at me with ion disruptors. What, they thought I wouldn’t carry a weapon accelerator? Flash, boom, three tiny ash piles. Tried to collect and Lord “No Disintegrations!” refused to pay without bodies. My word’s not good enough, apparently.

  
  
  

  
  


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  Additionally, he's directly confirmed to NOT have been who killed Aunt Beru and Uncle Owen; as Fett found their bodies:

  
  

  
  

  ... I picked up trooper buzz that Vader was looking for a couple of runaway droids. Figured I’d collect the bounty ... Reckoned I’d make up the loss by finding his droids and holding out for twice the reward.

  
  

  No go on that. Trailed one until its footprints were wiped out by a Jawa sandcrawler. Followed those treads a way until I found someone had wiped out the Jawas, too. “Someone” meaning amateurs trying to fake a Tusken raid. Probably stormtroopers, judging by the random blast shots. Some might call them precise. Me, I say they can’t hit the butt end of a bantha. At least they had brains enough to take out everyone who had seen the droids. Hard luck on the sizzled hicks I found at that torched moisture farm.