Now, let's set emotions aside for a bit and this about it logically. What we have is a girl calling 911 greatly exaggerating her situation (the "danger" she is in), explicitly using gender of the man, but, at the same time, knows that she is recording her. The women is well-educated, a VP of a financial firm, so, she should be smart. Now, we have two possibilities:
1) She is malicious. She got pissed on the guy who insisted she put the dog on the leash and maybe even had a heated verbal exchange with him. She may be even racist. So, he want to get back at him, calls the cops, and pretend she is in danger. She is very rational and able to think straight
2) She had a heated verbal exchange with the guy, she is afraid he want to poison her dog, and she interpreted something that he said as a threat to herself too. She is afraid, she called the cop, and say what he think it is. She said the guy's race because she genuinely more afraid of a black guy in secluded areas of the part (because she knows that most attacks do involve black guys). She is not able to think straight.
Now, remember that she is smart and she knows that she is recorded. Anyone still believes that option 1 is possible? If she is thinking straight, she knows of high risk of negative consequences (due to recording). I believe, she was not able to think straight at that time. Hence, she was genuinely afraid and option 2 was more likely. Furthermore, the fact that the guy had dog threats with him shows that he was looking for confrontation with an appropriate dog owner.