You have a costumed identity that is a well-established hero. Few people will question your right to investigate things, bear arms or ask pointed questions. You can also gain access to places and people unavailable to the general public. Police and other law enforcement figures will often cooperate with you, but not always. People will not question who you are in costume.
This makes Intimidation rolls to get into a secure area much easier; you will generally succeed on a simple succes, and not need any outcome. Of course, if your heroic identity is a known enemy or specifically banned, you get no bonus.
Over time, your costumed identity has built an identity and reputation of its own. You can make two contacts checks for a skill, one for your mundane identity and one for your costumed identity. People will also turn to your costumed identity for help.
You need not purchase this schtick to gain access to places your job ought to give you access to. Cops usually get access to crime scenes, military officers can get into military bases. But with Heroic Identity, you can get into either.