commas - Are sentences limited to one coordinating conjunction?

I have a sentence, and I'm not sure if it should be written as in example one or two:

Example one:

Someone keeps on popping my car's tires. So I installed a camera onto my car, and I caught the guy.

Example two:

Someone keeps on popping my car's tires[,] so I installed a camera onto my car, and I caught the guy.

As shown in my two examples, one of them has a comma before "so." So, which would be the better sentence?