Having thought of tools that could mask odors, their next task was to determine exactly which cleaning company Central Bank had hired and what kind of detergent that company used.
The cleaning company was easy enough to identify. Their all-blue uniforms said it all. Lex worked the keyboard beside him and said, "Luthor Manor hired this company before. Its full name is Metropolis Snow Mountain Cleaning Co., Ltd. It's also the largest cleaning company in Metropolis, with more than 1,800 employees..."
"Here's their information. I hacked into their internal database and pulled their recent business records. According to this file, Central Bank booked glass curtain wall cleaning services on March 18."
Bruce stepped up to the screen and examined the information displayed there. The order showed that Metropolis Central Bank had booked glass curtain wall cleaning services. Fifty employees had participated; excluding technicians and drivers, there had been forty-three cleaners, all male.
The records showed that they had dispatched three vehicles, each carrying four large toolboxes. One toolbox held all the cleaning agents, but the specific brand was not listed.
Having found their purchase order, Lex continued working at the computer. He said, "Pyro-brand cleaning agent raw materials, marked with a blue bear head, which is why they're also called Blue Bear cleaning agents. Snow Mountain Company has used this product for more than a decade."
"There's no finished product specifically for cleaning glass curtain walls. They purchase the raw materials and mix the formula themselves. I'm checking their exact procurement information..."
After tapping at the computer again, Lex said, "Their formula is confidential, but I can find the approximate chemical composition. Judging from the ingredients, it definitely has an odor, but whether it can cover the smell of blood is uncertain."
Bruce glanced at the ingredients on the screen.