According to Dictionary.com, the adjective plausible means:
Having an appearance of truth or reason; seemingly worthy of approval or acceptance; credible; believable:
a plausible excuse; a plausible plot.
The entire premise of the movie "Criminal" is about the process of injecting the memories of one human being who has died into another person who is alive and is a dangerous criminal. Unfortunately the fact that a medical procedure like this is impossible is irrelevant to everyone who decided to make this ridiculous movie. Perhaps 500 years from now something like this will be possible through a brain transplant or some other means using computers but most likely not from injecting cells from one brain to another brain. Had this movie been set in the distant future then perhaps it would have been a better experience, but this movie is set in the present day and from the beginning idea of transferring the memories of one brain to another is downright stupid and from there there is no reason to continue watching this mess.
For some unknown reason, Hollywood producers seem to be in love with the concept of one character becoming another character and having the memories of another person. The movie "Face Off" is one example of this, "Selfless" , which came out last year starting Ryan Reynolds , who is also in this movie is another example. There are several other movies over the years with this theme of personality transfer and the plausibility and believe-ability of an idea like this means nothing to the producers. Perhaps the box office numbers for this idea has worked in the past, so the producers believe that if it works once then it will just have to work again.
Making matters worse is that the overall story of Criminal is a bad one. Some kind of spy played by Ryan Reynolds is killed before he is able to give valuable information to his CIA bosses about a mastermind who is trying to obtain software that can control nuclear devices. The idea to then inject his memories into an insane criminal played by Kevin Costner really makes no sense here but perhaps the thought was that this experiment was to see if injecting the personality of a good person into an insane criminal would make the criminal a better person? This stupid idea also does not work in this movie.
Kevin Costner has made a good number of bad movies lately, the last few include McFarland USA and Black and White . I was also surprised to see great actors like Tommy Lee Jones and Gary Oldman in this bad movie and it made me think that there must not be too many good scripts out there for quality actors anymore because this was a pretty bad movie that should definitely be missed.