Sherlock had just arrived to work one day when he happened to overhear a conversation between some coworkers on the way in. The conversation went like this:
Bob: Did you hear they just came back with a verdict on the murder trial? They jury found her not guilty.
Alice: That's insane, Everyone knows she's guilty. She practically admitted to it before her lawyer forced her to plead the fifth! Just because she's a celebrity and got some fancy expensive lawyer to make up stories about police misconduct and fabricated conspiracies doesn't change the fact that all the evidence shows she clearly shot that poor man. This is a travesty of justice!
Bob: Yeah so far all the news I see agrees with you that she should have been found guilty. But look on the bright side, she could still be found guilty for that murder in another trial, after all legally she could be tried for murder up to 6 more times for shooting him.
Eve: More, if you count civil suits.
Sherlock hurried on to his office to start his day of work, missing the rest of the conversation. He was never one to kept up with the News, so this is the first he had heard about the trial his coworkers were discussing, but it seemed interesting enough that he was tempted to look it up during his lunch break. He would have thought they would have video cameras or other witnesses at such an important location as where the murder must have happened, something to help identify the killer easier.
Where does Sherlock think the murder happened, and why?
Note that while the murder could have taken place at a number of locations given convoluted enough circumstances, I think one location makes the most sense to be the one Sherlock is presuming, given his thought process.