Friars, saints, and facts

People have talked here recently of history, religion, and what is factual in the Islamic religion's history.

Switching for a moment to Christianity, do people know the facts surrounding Pope Francis' canonizing the Franciscan Friar Junipero Serra today?

See:
https://en.wikipedia.org/wiki/Jun%C3%ADpero_Serra#Serra.27s_work_for_the_Inquisi...

See especially the part in the article re
Relationship with Native Californians

Am not sure I know the prerequisites for being a saint.

https://en.wikipedia.org/wiki/Canonization

http://www.dummies.com/how-to/content/what-are-the-requirements-for-sainthood.ht...

http://www.catholicdoors.com/faq/qu221.htm

I think we have some Catholic historians in the Group that can shed some light on this.