Generally the answer is yes- if you are charged with a criminal offense you can potentially receive jail time if convicted. However, for specific information, you might want to post this question in New Mexico.
The previous attorney response is correct, you should consult with an attorney in Albuquerque to discuss the laws in the state. You indicate that your friend may be charged with child neglect. I recommend that your friend speak with an attorney asap and not speak with law enforcement regarding the incident until consulting an experienced criminal attorney.