Now Playing: California police finally stop driver of stolen car after crazy 90-minute chase

Now Playing: Mega Millions winner 'humbled' over $533M jackpot

Now Playing: Murder-suicide includes incestuous couple: Police

Now Playing: Former TV producer arrested for allegedly killing her sister

Now Playing: Personal items found from family of 4 missing 1 week after car plunged into river

Now Playing: ID of baby girl found dead in suitcase is unknown

Now Playing: NYC tourist robbed at knifepoint of 'Make America Great Again' hat

Now Playing: Ex-NFL cheerleader accuses team of discrimination

Now Playing: Police probe death of teen found in van

Now Playing: Police officer shot and killed serving warrant in Cape Cod town

Now Playing: RNC prepares aggressive plan to discredit Comey

Now Playing: Comey says Trump asked him to investigate 'dossier'

Now Playing: Female trucker says she keeps a knife, mace after being attacked

Now Playing: Mother traveled to Mexico to hunt down the man suspected of molesting her son

Now Playing: US announces that national park fees are going up

Now Playing: Police investigating after teen crushed to death by van seat

Now Playing: Major storm causing blizzard warnings across 7 states

Now Playing: Pressure mounts for Missouri governor to resign after bombshell report

Now Playing: Former 'Cosby' actress talks topless protest

Now Playing: Body of 'Buckskin Girl' found in Ohio in 1981 identified as Arkansas woman