The prosecution challenged Richard Bain’s defence witness Monday in an assessment that the accused in the Metropolis shooting had no recollection of the events of election night 2012. 

In a fifth day of testimony, Bain’s psychiatrist Dr. Marie-Frederique Allard said the suspect was not criminally responsible for his actions the night of Sept. 4, 2012.

She said that Bain was mixing three anti-depressant medications, something which should not be done, and was not taking other medication that she normally prescribes in conjunction with anti-depressants.

The prosecution pointed to a confession Bain made two months after his arrest in a letter to Allard.  Allard referred to it in her lengthy evaluation report, but didn't go into details.

The letter says how Bain planned to set fire to the Metropolis and kill as many separatists as possible, including former premier Pauline Marois and other PQ MNAs. 

He said he was planning to go to the front of the club to set a second fire, trapping people inside. 

In the letter, Bain also writes that he could be declared not criminally responsible and that he would have been sent to the Pinel Psychiatric Institute. 

The prosecution wondered why the psychiatrist never brought up these key incriminating details and asked if Bain might have been faking his amnesia. 

The psychiatrist insists that in all probability, Bain was suffering from a psychosis when he wrote his letter.

Allard agreed with a Crown psychiatric witness, Dr. Joel Watts, that Bain has bipolar disorder which was not diagnosed at the time, and was made worse by taking medication.

However doctors Allard and Watts disagree as to whether or not Bain was criminally responsible for his actions.

Watts is expected to testify Tuesday that Bain went through an "adjustment disorder," something that is common in those suffering from high stress.

Bain is on trial for murdering Denis Blanchette and shooting Dave Courage on Sept. 4, 2012, and setting fire to the Metropolis theatre, all part of an alleged attempt to kill Marois.

If Watts's testimony is brief, the case could go to a jury this week.