Chemical Criminal.

The doctor nearby says "the elements were not at all any of the six elements that compose 99% of the human body."

The stores security says "The element was boisterous about how stable they are"

Jenny, the teacher at the Education Center for Chemical Elements says "All the lanthanides are at school right now"

Micheal, Jenny's dog barked "I couldn't smell the element"

Jerry a maintenance worker at the grocery store says "The suspect walked over the store's scale carelessly. I don't remember exactly what the weight was but it read something less then 180 AU"

The owner of the magnet store next door says "My magnets felt nothing"

Dory, the nearby traffic light camera says "Their license plate read their name. I don't remember exactly what it said but I know it does not start with a B"

Shirin the mayor of the town says "All I know is that its salts does not produce violet fireworks since I stored all salts that produce violet fireworks."

The suspect is______