(CNN) It's 1:48 a.m. and a pregnant Shanann Watts is arriving home from a business trip to Phoenix.

Front-door video at her Frederick, Colorado, home captures the moment a friend drops Watts from the airport on August 13, 2018. She can be seen carrying her suitcase up the driveway and to the door.

The short video clip is believed to be the last time Shanann Watts, who was 15 weeks pregnant, is seen to be alive. Within hours -- possibly even minutes -- Shanann was slain, authorities have said.

Her husband, Chris Watts, pleaded guilty in November to first-degree murder and other charges in the death of his wife and young daughters. He was sentenced to five life sentences with no possibility of parole.

HLN obtained the new video through an open records request with the Weld County District Attorney's Office. Prosecutors had not previously released the footage.

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