I think a Conservative government could achieve the same end by making the criteria for dangerous offender more robust. They can require that multiple murders create a prima facie case that mandates continuous incarceration.
These are the current criteria:
The court
may declare an offender a “dangerous offender” where:
- the offender is convicted of a serious personal injury offender and constitutes an ongoing threat on the basis of:
- a “repetitive behavior” showing a failure of restraint and “likelihood” of causing injury or worse
- a “pattern of persistent aggressive behaviour” that shows “a substantial degree of indifference” to the “reasonably foreseeable consequences” of his behaviour; or
- in the “brutal nature” of the offence, the offender is not likely to be inhibited by the normal standards of behavioral constraints” or
- the offence is a serous personal injury offence and “has shown a failure to control his or her sexual impulses and a likelihood of causing injury”.
It should be relatively easy to argue that a multiple murder has already met all the criteria.