( CNN ) -- A man suspected of killing a young New York mother and her toddler in 2010 was arrested in Nicaragua one day after making the FBI 's Ten Most Wanted list . On Friday , authorities said , he was returned to the United States . Juan Elias Garcia , whom the FBI calls an `` enthusiastic murderer , '' had a $ 100,000 reward on his head . `` The pressure generated by this publicity was too much for Garcia to bear , resulting in his surrender and return to the United States , '' George Venizelos , FBI assistant director in charge of the New York field office , said in a statement . Garcia surrendered Thursday to authorities at the U.S. Embassy in Managua , Nicaragua , authorities said . Garcia voluntarily agreed to return to the United States and was arrested in New York Friday after the FBI sent a plane to transport him , the statement said . He is to appear in federal court on March 31 . `` Garcia 's callous disregard for human life resulted in the senseless murder of a young mother and her helpless 2-year-old son , '' Venizelos said on the agency 's website on Wednesday . Garcia is alleged to be a member of the violent MS-13 , or Mara Salvatrucha , gang . He was thought to be hiding in El Salvador . The FBI said a romantic entanglement and gang rivalries lay at the heart of slayings . Alleged victim Vanessa Argueta , 19 , is said to have had a romantic relationship with Garcia , and she 's also believed to have had ties to two rival gangs : the 18th Street gang and the Latin Kings . `` They were going to kill her for disrespecting the gang , '' Special Agent James Lopez said in the FBI release . `` It is unacceptable for MS-13 members to have girls they associate with be involved with rival gang members . '' The FBI said that under the guise of an invitation to dinner in Central Islip , New York , Garcia coerced Argueta and her 2-year-old son into the woods . There , they were met by two co-conspirators -- members of Mara Salvatrucha -- and Argueta was murdered execution-style in front of her son . The FBI said the same gun was then used to kill the toddler .
Juan Elias Garcia , who had a $ 5000 reward on his head , surrendered in December . He 's accused of killing a 19-year - old woman and her 2-year - old son . A soured relationship and gang violence are involved , the FBI says .