This photo provided by Canon City Police shows Jaacob Vanwinkle, who has been charged in connection with the murder of a mother and two children in Canon City, Colo., Sunday, March 9, 2014. (AP Photo/Canon City Police)

CANON CITY, Colo. | Authorities were pursuing a man who failed to register as a sex offender when he was accused of killing a mother and her two young children and sexually assaulting her teenage daughter in southern Colorado.

Jaacob Harding Vanwinkle

Police said Tuesday they were seeking an arrest warrant for 31-year-old Jaacob Vanwinkle before he was apprehended Sunday at the Canon City home where the three bodies were found. The victims included a 5-year-old boy, a 9-year-old girl and their 35-year-old mother.

Police Sgt. Shannon Byerly says Vanwinkle had dated the woman and was living in the family’s home.

Vanwinkle had been required to register as a sex offender since 2004, when he was convicted and sentenced to seven years in prison in Indiana for child molestation and other sex crimes involving girls as young as 5 and 7.

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