lee wrecker's shop, she called 911. >> i saw her and she was saying, he's not breathing, he's not breathing. >> reporter: but just two blocks away, mechanic jeff olsenone. he registered his phone with app pulse point. alerting people who know how to do cpr with local emergencies. >> i looked at it. it said cpr needed. and it gave the address. >> reporter: with first responders several minutes away. olsen arrived and immediately performed a life-saving service. >> this guy came out of nowhere. and scooped the baby up and really knew what he was doing. which was just such a blessing to all of us. >> i don't think i have ever done cpr on an infant before or rescue breathing. it was, when i got done, i shook for about ten minutes. >> reporter: the spokane fire department grateful for the assist. >> the reason why we are so invested in this technology is because you can be a life saver. >> reporter: while leslie, the mother and her baby, grateful for their new friend, who had the foresight to simply download an app. >> that's great. more and more emergency services across the country are using this technology. it's working. and if you are cynical about a