It's beyond a reasonable doubt.
Also, you asked why we have to prove it every time.
On April 20th, 2009. See this statement in context.
On April 20th, 2009. See this statement in context.
Deputy Chief Prosecutor of Criminal and Penal Prosecutions, Organized Crime Prosecutions Bureau, Department of Justice (Quebec)
It's beyond a reasonable doubt.
Also, you asked why we have to prove it every time.
See context to find out what was said next.