father throws children off bridge

This is absolutely insane. In Alabama, a man confessed to authorities that he threw his four young children off an 80-foot-high bridge to their deaths: Dad threw 4 tots off bridge for revenge, police say.

Lam Luong, a 37-year-old shrimp fisherman, was charged with four counts of capital murder, as divers searched the bodies of the children, who ranged in age from a few months to 3 years.

Luong had initially reported the children missing, telling police that he had given the kids to his girlfriend and that she failed to return them. He has had a history of drug problems and arrests, and a heated argument with his girlfriend apparently drove him over the edge.

Missing and presumed dead were 4-month-old Danny Luong; 1-year-old Lindsey Luong; 2-year-old Hannah Luong; and 3-year-old Ryan Phan. I'm completely stunned at what kind of evil people are capable of. What kind of lunacy could drive a man to do this to his own children?