“No problem! I’ll gladly give full cooperation!”

Alex immediately bowed.

Soon, Buckwood Police Station sent Harvey various surveillance footage.

Ray Hart called the technicians and they began to check various devices.

Harvey also had his men take some samples from the scene of the accident.

When Harvey checked the materials, he smiled and said, “Leader Swift, this sand is indeed sea sand.”

“It’s forbidden to use it for construction as they are very corrosive. However, signs of such corrosion will only appear until ten or twenty years later.”

“There’s a lot of concrete mixed with the sand. How could the buildings collapse straightaway?”

“Judging from these samples, someone must have deliberately mixed something else in the materials.”

“What?!” Alex and the others gasped. Was someone trying to frame Mandy?

“Strong acid.”

Harvey replied indifferently.

“A very simple method. Add strong acid to a building that hasn’t completely solidified. The building will then collapse quickly