PHOENIX -- An Arizona woman is accused of killing her daughter and trying to fatally stab her husband and poison her other three children over a custody dispute on Christmas Day.
A 51-year-old Phoenix man is being held on a $1 million bond after police said he killed his 13-year-old son with an ax.
A father apparently killed himself and his daughters, both under 10, in a suburb west of Phoenix.
In Southern California, a man apparently killed his wife and their two children before turning the gun on himself a day before New Year's Eve. In New Mexico, a 38-year-old woman faces charges after police say she kicked her child to death two days after Christmas.
The family-related killings happened around the holidays, and while people look for answers, experts said they vary case-to-case. But many have common themes -- custody disputes or nasty divorces -- coupled with a time relatives are gathered for celebrations.
Experts said close quarters and, in many cases, discord in the families, can lead to tragic consequences.