"Missing Witness" is the sort of B-movie that was very common back in the 1930s and 40s. Despite coming from a top studio (Warner Brothers), it was quickly written, has tons of plot holes and really is only enjoyable if you turn off your brain and just take it for what it is...a fast little crime film for the undemanding audience.
The film starts off well--with a crazy car crash. Then, a group of thugs from a local 'protective association' arrive at a restaurant to shake the owner down for cash. He doesn't agree and they destroy the joint and beat him silly. On the way out, three of the thugs bump into an off-duty cop, 'Bull' Regan (Dick Purcell). Instead of saying 'excuse me', one pulls a knife, the other pulls a gun and the third tries to beat Regan. But Bull is the hero and quickly beats them senseless. However, in court the owner of the restaurant gets amnesia...and the case is thrown out. Think about it...three guys assault a cop, one with a gun and one with a knife, and they just dismiss the case and let the guys go?!?!?! This is a HUGE plot problem...and shows the film was rushed into production without thinking through the plot. After all, the weapons charges were much more serious than the other charges!
What follows is a city trying to get tough on organized crime sort of picture--and repeatedly the baddies seem to be able to anticipate everything. Witnesses die and someone up high obviously is involved with the mob. There also is a lady named Mary...and you get to hear the cops make a lot of awful sexist remarks towards her! My wife was horrified...I thought her reaction was a bit funny...but I certainly didn't blame her. Purcell's character as well as his boss behaved like pigs.
Overall, this is a pretty bad film despite the nice Warner Brothers gloss. Not horrible...but not all that good either.