An autopsy made public on Thursday indicated 7-week-old Jordan Judd died from asphyxiation.
He is reportedly her second child to die that way.
According to reports, in October 2006 Judd accidentally suffocated a 5-week-old infant she was sleeping with.
But her neighbors say she is a good mother.
"Well I've seen her come outside with them, I've taken refreshments over to the kids, and she has taken good care of them good from what I can tell," neighbor Karion Bell said.
Police say Judd was warned not to sleep with her children. They'll decide whether to file charges after social service workers complete an investigation.