An Alberta judge sentenced a St. Albert man to life in prison Thursday, after he pleaded guilty to fatally stabbing Jaeden Chaisson, 17, during a cocaine-induced psychosis.

Kaj Randall, 29, will also serve seven years consecutively for repeatedly stabbing Chaisson's then-13-year-old cousin, Brooklyn Janes, his common-law partner's daughter.

Randall won't be eligible for parole for 12 years.

The sentence from Court of King's Bench Justice Cheryl Arcand-Kootenay was based on a joint submission in wh…