Walmart supervisor bought the handgun the same day of the shooting|JeepersMedia|CC BY 2.0

A Walmart employee who shot and killed six of his co-workers and himself at a store Tuesday in Virginia left a “death note” behind.

In his note, he speaks about other employees who he felt made fun of him.

Andre Bing, the 31-year-old perpetrator, bought the handgun on the day of the shooting.