MS, being convicted of murder with a life sentence, is not now and never will be "entitled" to release on parole at any time. The 25 years is the length of time before he will be
eligible for parole, but it doesn't suggest or indicate that parole will be granted, then or ever. While most murderers
do eventually get released, and in fact have a very low rate of recidivism, those with a history of criminal and/or violent behaviour, psychopathy, drug abuse etc. are unlikely to meet conditions for parole. Those who
are paroled are on parole and subject to strict conditions for the rest of their lives.
So MS
might meet those conditions in the future. He has some things going for him, including family support and some demonstrated willingness to better himself, as evidenced by his academic achievements in custody. Only time will tell. There is something called the "faint hope clause" that allows prisoners to apply for parole after 15 years served - but it is well named, as this opportunity rarely results in earlier parole.
Whether either accused will receive a consecutive, rather than concurrent, life sentence remains to be seen, as the specifications around consecutive sentences changed on the initiative of the Harper government, but as I understand it, the decision is in the hands of the sentencing judge who has much latitude here.
As for DM being a dangerous offender -- he clearly is one, and I suspect he has committed other serious crimes, possibly including homicide, that we haven't heard about. But he will not be declared a "dangerous offender" under the law. That is because such a classification is redundant in a case like this. He is already sentenced to life in prison, and one sentence for M1 or three, he is unlikely
ever to be released. The "dangerous offender" designation is designed for violent or predatory criminals who repeatedly prey on others, have multiple convictions, but whose offences yield sentences far shorter than life and who can therefore look forward to being released - to strike again.
See this explanation of the term, and then the very interesting list of offences which can engender this classification:
https://www.publicsafety.gc.ca/cnt/...nst-hgh-rsk-ffndrs/dngrs-ffndr-dsgntn-en.aspx
and
http://criminalnotebook.ca/index.php/List_of_Dangerous_Offender_Designated_Offences
A propos of a couple of other posts re included offences - I remember that in the Sammy Yatin case, the police officer was charged with 2nd degree murder but the jury convicted him of attempted murder, so attempted murder seems to be an included offense as affirmed also by this source (you have to scroll down a ways):
http://criminalnotebook.ca/index.php/Murder_(Offence)#Lesser_Included_Offences
I wish we could see the text of the judge's charge to the jury - it is bound to be both interesting and very informative.