A courtroom in Barrie heard more gruesome and disturbing testimony on Tuesday at the trial surrounding the deaths of two women at a hotel in 2012.

Paramedics, firefighters, a nurse and a respiratory therapist all took the stand at the trial of Mark Dobson, who is charged with two counts of first degree murder in the deaths of Helen Dorrington and Mary Hepburn at the Travelodge on Bayfield Street.

So far, court has heard that Dobson and the two women met on a website called “Joy Of Satan”.

Simcoe County Paramedic Jeff Warriner told the court Tuesday that Dobson told him the three were "involved in a suicide cult pact" and that it was Dobson’s job to “kill the other two people and then kill himself."

Warriner also testified that Dobson said he “came up from behind them and put them in a sleeper hold and finished them off with a knife" and that Dobson had two 4-inch deep lacerations on either side of his neck as well as cuts on his arms.

Warriner also told the courtroom that Dobson told him all three had consumed alcohol, smoked marijuana, and had taken prescription drugs.

Also on Tuesday, three firefighters who were at the hotel took the stand, telling court that Dobson said “I did it.”

The defence suggested that didn’t mean Dobson was admitting to killing the women.

A trauma unit nurse that initially treated Dobson for his wounds testified that he repeatedly said things such as "it wasn't supposed to happen this way", "people from another planet were coming to get them", and that "it was the hardest thing he ever had to do."

A respiratory therapist told court that Dobson said he and the women had a pact to take pills, slip away peacefully and travel to another planet. 

He says Dobson said the women became noisy, so he put one in a chokehold and placed a pillow over the head of the other.

The respiratory therapist told the court that he asked Dobson to stop sharing information but that Dobson continued.

The Defence says Dobson suffers from a psychiatric disorder and cannot be held criminally responsible for his actions.

The trial continues tomorrow.