Trisha stood at the remnants of her burned down childhood home, and discovered that the basement was still intact. She ran down to the basement and found a chest that contains Edward's knowledge of the outside world. Trisha opened it with alchemy. Inside the chest was a book of memoirs about Edward's journeys through the world beyond Amestris.
Inside the book was a photo of him at a party with a short black haired woman with green eyes in an emerald green trench coat and purple gloves standing in front of some mysterious flags that looked like yellow horizontal/vertical crosses with red trim on royal blue fields with dragons and crowns on each corner. The dragons looked a lot like the Amestris lion with their curled tails, except they were gold, not white.
There was a note on the photo that read; Photo Taken in Albion at 11:30 PM on February 3rd, 1920. Trisha examined it.
"This must be when Ed discovered the outside world beyond Amestris." Trisha thought. She looked around and saw that the Mafia left their calling card at the scene of the crime, a business card for Bristol Enterprises.
"I need to report this." Trisha said to herself.
Trisha spoke to Ed in the United Colonies Council meeting room, holding the business card for Bristol Enterprises.
"Our house burned down, and I have evidence." Trisha said to her father. "Bristol has gone too far."
"Ok then." Edward said. "We will prepare an all out assault on Bristol's residence, if we can locate it."
"How will we do that?" Trisha asked.
"I am sending a blimp to take photos of the Bristol residence and the route we need to take to get there." Edward answered. "Board the blimp and take photos or a recording, any evidence of the place so we can find him and bring him down for good!"
Ed had escorted her daughter to the United Armed Forces Armory, where the UAF were stationed. They wore grey uniforms, since Alphonse was a grey suit of armor. A blimp was docked at the base, ready for espionage. Trisha boarded the blimp and went off to take photo evidence.
The blimp hovered in the skies over National City, along the pathway to Bristol's safe house. Trisha was taking pictures of the route as the blimp flew across the sky. The blimp hovered over a large mansion in Center Park that had Bristol's statue in the garden/courtyard took a picture of it. The blimp turned around and headed back to the base so Trisha could deliver the photos to Ed.
Trisha went back to City Hall and handed Ed the photos.
"Bristol's residence is a big mansion in Center Park." Trisha said. "We should prepare for an all out assault on the mansion tomorrow."
"Trisha." Edward said. "Go get some fancy clothes."
"Why?" Trisha asked. "My clothes are just fine."
"This is a big invasion, so you gotta do it in style." Ed said. Trisha went off to a clothing store to buy some fancy clothes to look fashionable while storming the Mafia headquarters.
