A week later, Greer's sons, ages 9 and 13 came forward and told police they had heard Greer and Esquivel fighting, then a gunshot that substantiated Greer's own claims he had murdered his girlfriend. When the residence was searched, police found evidence of murder but did not find the body of Esquivel. A warrant was issued for Greer's arrest and he was indicted for murder in March 2007.

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Greer was born September 17, 1965. He is described as a white male, 5' 10" height, approximately 200-220 lbs, with green eyes and brown hair. He has been known to dye his hair blonde and shave his head. He may also be wearing a beard or goatee. He has scars on left forearm and left thigh and missing the second toe on his right foot. He is known to be a chain-smoker and addicted to alcohol and cocaine.

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Greer is considered armed and dangerous.

William Greer was arrested in November 2017 following a joint operation by the United States Marshall's Office, the Harris County Sheriff's Office and Mexican authorities in a remote city in the southern state of Tabasco.

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At the time of his arrest, Greer was going by an alias in remote Nacajuca, a Mexican town in the Yucatan peninsula near the Guatemala border. He was living with a woman and two children and detained without struggle as he went to pick up the children at school.

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