So glad she was found!
This is my own opinion/speculation. Maybe Martinez had warrants out fir his arrest in TN or another state. He panics and takes off despite holding the little girl. If he puts her down, she may cry and he gets caught. He decides to take her. Also, if he ran with her, the chances of LE shooting him while he's holding OS would be slim to none. He used her to protect himself. Last night,I did find something about either him or someone with the same name getting arrested for drug paraphernalia. Since I'm not 100% sure it was him I didn't post a link. If it was him, he may have warrants out for his arrest. He could have fled MA and knew someone in TN and was hiding out there.