'He lived there with the mum and dad for a little while, but was recently asked to leave with some disagreements, ' Ascension Sheriff Bobby Webre said. After murdering his parents, the 21-year-old went on to kill three more people inside another mobile home in Livingston Parish.
Investigators believe the two crimes are connected, and were motivated by a domestic dispute involving Theriot's girlfriend, Summer. Detectives are still on the lookout for Dakota Theriot, who remains at large, WVUE-TV reported. Authorities said Saturday evening he may be out of state now. Webre said that information led authorities to zero in on the couple's son as a suspect.
The Ernest family's two youngest children - ages 1 and 7 - were unharmed in the shooting. The victims were identified as 50-year-old Elizabeth Theriot and her husband, 50-year-old Keith Theriot - the parents of the accused gunman.
Dakota Theriot was being sought on charges including first-degree murder.
This undated photo provided by Livingston Parish Sheriff's Office shows Dakota Theriot, 21.
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Police say the shootings happened in Livingston Parish and Ascension Parish, east of Baton Rouge, shortly before 9am on Saturday. Summer Ernest is believed to have been in a relationship with Dakota Theriot. Those victims have been identified as Billy Ernest, 43, Tanner Ernest, 17, and Summer Ernest, 20. He was believed to be driving a stolen 2004 Dodge Ram pick-up truck, grey and silver in colour. Authorities said those people are "safe" as of 2 p.m. Saturday.
"My mom is a good judge of character and she just thought he was not good", DeYoung said of Theriot.
At least five people are dead in Louisiana as law enforcement officers search for a suspected gunman who is considered to be armed and unsafe.
Authorities said they believe the shooting in Livingston Parish took place before deputies arrived to the Theriots' home in Ascension Parish.
Weber cautioned the public: If you see the vehicle, notify the authorities and do not approach it.