Killer of his 3 daughters and their chaperone lived in church where it happened, police say

The man police say shot his three daughters and their chaperone to death before turning the gun on himself in a Sacramento church Monday evening was living at the church, CBS Sacramento reports.

Sacramento County sheriff's Sgt. Rod Grassmann told the station David Mora, 39, was residing there as part of "some sort of arrangement." The three girls and their mother lived elsewhere.

Grassmann called the killings "unfathomable."