THR says this one comes from Amblin Television and, at the time of this writing, the network has only committed to a script so far. So this may or may not go to series. John Glenn is writing.
According to the site:
Maggie centers on the Gills, a loving a middle-class family in Eugene, Ore., who find themselves in the midst of crisis when paranormal occurrences begin to affect the everyday fabric of their home. At the same time, a series of brutal murders is being investigated by two local detectives. The storylines converge as those involved slowly realize that the murders and hauntings may have a common link: Maggie Gill, 15-year-old daughter of the Gill family, who might be possessed by demonic attachments.
We’ll let you know if this one moves forward!