Fluently bilingual, LaPierre was best known for having been co-host with Patrick Watson of the CBC's influential public affairs show This Hour Has Seven Days in the 1960s.

[3] After the show's much publicized cancellation, LaPierre moved to politics as a "star candidate" for the New Democratic Party in the 1968 federal election.

[citation needed] He moved to Ottawa in 1990, continued to work in broadcasting and writing, and lived there until his death, in the later years, with his partner Harvey Slack.

Later Harvey Slack financed the construction of a large memorial in LaPierre's name in the small MacLaren Cemetery near Wakefield, Quebec, close to the grave of his ex-wife's uncle Hume Wrong and that of former prime minister Lester B. Pearson.

The McGill University Archives holds an extensive collection of his papers, including documents that touch on four aspects of his career: academic, journalistic, political and entrepreneurial.