"Last week, when we stopped getting calls, I thought something happened, she, you know, died," Coelho told KCRA 3 last month.
But weeks later, Frida was spotted again. And Coelho came looking.
"I'm like, 'OK. We're going to find this dog,'" Coelho told the LA Times. "I never work weekends. It was meant for me to work that Saturday."
After another exhaustive search, Coelho found Frida cowering on a highway median.
"We're saying, 'It's all right, it's all right,'" Coelho told the LA Times. "And those big brown eyes just staring up at me ... She didn't fight us after that at all."
Frida had been on her own for five weeks. And it showed. At just 44 pounds, she was dangerously underweight. Her leg was broken.
"I don't know how you sit on a freeway island for five weeks and not get creamed," veterinarian Mike Johnson of VCA Bradshaw Animal Hospital told the Star-Telegram. "I guess she was eating garbage. I'm not sure where she was getting water."