I'm sorry, but what do you want the company to do? This was his personal life. It had nothing to do with his employer. He didn't abuse these snakes while performing his job.
Do you want an employee calling the hotline on another employee because he got a speeding ticket, or a DWI/DUI? Would you report an employee that let his dog out and it was hit and killed by a car? How far do you take it? What the guy does on his own time IS NOT the concern of the employer. No one wants Big Brother interfering with their personal life, but that's exactly what you did. You brought Big Brother into his life and by association, into your life.
I'm not taking up for the guy. He did wrong and should never own another snake or possibly any other animal. But it's not up to the employer to determine that. If you wanted to report him, the local authorities would have been the way to go.
Like I said in my other post, since your wife was the ONLY ONE to know about this, there's no way he won't know who dropped a dime on him. If he's not fired, don't you think he's going to have it out for your wife? If he's got friends in higher places, do you think they're going to be interested in your wife's well being? You will have no friends or advocates in the workplace. That could be very hard for your wife. Remember, you called the hotline for only one reason, to get him fired. He and his friends won't have to directly use this incident to make your wife's life extremely difficult.
I hope nothing happens to your wife's career, but if it does, she's the cause for it.
Vengence is best served cold.
Good Luck!
Jim Smith