RIVER FALLS KILLINGS: Did Father kill his 3 daughters to get back at their mother?

RIVER FALLS KILLINGS: Father called ex-wife, asked to visit girls before killings

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Domestic violence is a demonic killer of spirit, mind and body!

This divorced father of 3 called his ex-wife while she was at work to request an impromptu visit with his daughters who were at home with a babysitter.  The mom agreed. The father later called his wife back at work to tell her he harmed the children and for her to come home. The mom called police first who made it to the home before she did and they found the bodies of her 3 daughters ages 11, 8 and 5.

Was he trying to get the mom home to kill her as well? The presence of gas was strong in the home so had he planned a murder/suicide of the entire family?

Why didn't he just kill himself?!