After all, the Watchmen vigilante willingly sacrificed himself via Doctor Manhattan because he couldn’t live quietly after learning about Adrian Veidt’s squid monster.
Because that is precisely the kind of justice-driven behavior that Rorschach would fall into.
Sounds like Petey has taken the same kind of no-holds-barred approach to discovering the truth, even if his silver suit doesn’t look anything like Rorschach’s frumpy coat-and-hat look.
Walter Kovacs wasn’t a member of the FBI or the NYPD, which is probably the biggest strike against the Petey/Rorschach argument, but the fact that Petey’s Lube Man so quickly defected from authority in order to pursue investigations into the Tulsa murders and conspiracies makes his governmental connections now moot.