Rebecca Rivera is seen in this mug shot released Feb. 4, 2021. GALVESTON, Texas – The mother of a boy known as “Little Jacob” has been sentenced to life in prison for killing the 4-year-old boy and dumping his body on a Galveston beach. Rebecca Rivera was convicted of first-degree injury to a child causing serious bodily injury and sentenced Thursday. The body of “Little Jacob” was found on East Beach in Galveston in October 2017. AdProsecutors said that Rivera admitted before the trial that she would beat Jacob whenever she got frustrated with Gomez.