Is this person still your partner? Is the business actually a partnership or are you using the term "partner" colloquially?
If I were you, the very first thing I'd do would be to discuss it with your partner. You said you already reported it to the bank. If you report it to the police, that obviously may have a negative impact on your business.
Ummm...at the police station (hard to believe you didn't know this).
Unlikely, but no one here has the ability to predict intelligently how some unknown cops will react to particular stimulus.
As in you have a particular person in mind? You're obviously free to contact the district attorney's office in the county where this happened, but the folks there are likely to tell you to make a police report.

