RCMP Commissioner Bob Paulson will take the witness stand today at the force’s Labour Code trial in Moncton, N.B.
The national force faces four charges stemming from a 2014 shooting rampage that left three officers dead and two injured.
READ MORE: RCMP labour trial hears that no one took command during Moncton shooting rampage
The RCMP is accused of failing to provide members and supervisors with the appropriate information, instruction, equipment and training in an active-shooter event.
Paulson declined comment as he entered the court.
Carbine rifles were not available to general duty officers during Justin Bourque’s shooting spree on June 4, 2014, and numerous witnesses have testified they could have made a difference.
READ MORE: Number of elements to consider before arming officers with carbines, RCMP labour trial hears
Constables Fabrice Gevaudan, Dave Ross and Doug Larche were killed, while constables Eric Dubois and Darlene Goguen were wounded when Bourque targeted police officers in hopes of sparking an anti-government rebellion.