Maybe this should be the standard for the legal system
too: allow eye witness testimony to guide police
investigation but not be used as courtroom evidence.
I used to think this, until I had to sit on a jury. I ended up trying a case where the accused had allegedly gone to the victim's home, knocked on the door, then barged in and punched the victim a few times when he answered the door. Hospital records and photos meant no-one disputed the victim had been punched. But what evidence was there that the accused was the attacker? Only the eyewitness testimony of the accused and his wife.I struggle to see how such a case could be prosecuted without eyewitness testimony? Unless perhaps people put CCTV cameras all around in their own homes, and to me that doesn't sound like an improvement in civil liberties.
(After we found the guy guilty, the judge revealed the accused was awaiting trial for two other very similar offences with different victims)