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Lachazo was at Udell's home to deliver a washer and dryer her family bought from Best Buy, WCJB reported.
Police said the driver of the delivery truck was outside Udell's home making a phone call when he heard a scream, WTVJ reported.
The driver ran into the home and said he found Udell covered in blood, lying on the floor, police said. As the driver called 911, police said Lachazo jumped into the delivery truck and drove away, WTVJ reported.
A police officer saw the truck and pulled it over. He described Lachazo as "very sweaty and was shaking, as if he was nervous," WTVJ reported. The officer noted in his report that Lachazo's lower leg hair was burnt and it appeared he had ashes on him.
Police said Lachazo admitted to beating Udell and dousing her with a chemical. Police said Lachazo told them he had used marijuana and cocaine earlier in the day, WTVJ reported.
Udell's family is blaming the electronic box store, two delivery contractors and two deliverymen, including Lachazo, for her death.
The lawsuit says, according to WCJB, "Best Buy stores did nothing to investigate, supervise, or oversee the personnel used to perform these services on their behalf. Worse, it did nothing to advise, inform, or warn Mrs. Udell that the delivery and installation services had been delegated to a third-party."
The lawsuit was announced Friday, WTVJ reported.
"We've learned however that this type of violence perpetrated by a home deliveryman is not an isolated or even an uncommon act. Instead, across our country, the vulnerable have been targeted by those we trust and allow into our homes," Sloane Udell, Evelyn Udell's daughter-in-law, said, according to WTVJ.