It's clearly evidence of knowingly deleting data. It may not be evidence of knowingly deleting evidence. The distinction matters, because deleting data is not a crime.
Degaussing 3 times. Who does that when deleting data? Unless they don't want investigators to find the data? And isn't the data in this case a public record? Why delete a public record indelibly unless they had manipulated that record and wanted to hide the fact..?