Which has been done countless times in the past. It is the PCs that are claiming new evidence to the contrary and providing nothing. It is the PCs that are pretending to have authority because they know that authority sells, so they either have evidence or are a bunch of liars.
It doesn't even matter. If Horvath only has time for a 5 second sound bite, she should say "Safe injection sites save money and lives" instead of "the evidence shows safe injection sites work".
-k