This example needs clarifying. It sounds like WesternAnimation.Sherlock Holmes In The Twenty Second Century, but I don't know enough about that show to rewrite the example in a way that makes sense. The adventure referenced by this (film? series?) is "The Adventure of the Norwood Builder".
A movie this troper involving Sherlock Holmes returning in modern times, revived by a female descendant of Dr. Watson opens with a scene where a man in a white coat comes to a house to confront the owner. As they start fighting, a gun is drawn and goes off. In the next scene a man in a white coat torches a body lying under a blanket before he flees. At the end we find out that the house owner killed the visitor and put on his coat before torching the body (and the house).
This example needs clarifying. It sounds like WesternAnimation.Sherlock Holmes In The Twenty Second Century, but I don't know enough about that show to rewrite the example in a way that makes sense. The adventure referenced by this (film? series?) is "The Adventure of the Norwood Builder".