Based on
this article (in Spanish, google translated below) about his arrest posted Sept 1, 2014 at 12:01 AM it looks like he's been in custody for a while in Venezuela.
The earliest
article that I could find mentioning he went to Venezuela is from 2012 but it seems likely to me that LE knew this long before then. I'm curious if Venezuela refused to track him down for some part of the last 7 years or if they just couldn't find him. Found
another article with a quote from the DA who says that Venezuela usually won't extradite fugitives. Though
Wikipedia shows that the US and Venezuela do have an extradition treaty it appears the less then stellar diplomatic relations between the two countries means that the treaty hasn't been honored consistently. I was curious if Chavez's death a couple years ago led to improved relations and somehow led to his arrest but
that doesn't seem to be the case.
The way the below translation (bbm) alludes to bank records, tax records (SENIAT), his job and him moving to Margarita Island in 2008 only increases my speculation that he could have been found earlier but perhaps he was living under a false name or in some other way avoiding detection.
Google spits out this somewhat rough translation for the article:
"He killed his wife in Texas and fled to Venezuela
The Dominican Neriah Roberts was arrested in Porlamar. He was placed on card records and Seniat
CICPC agents arrested a Dominican Margarita requested by the United States for the murder of his wife occurred in Texas.
Neriah Roberts , 35 years old , was wanted by Interpol since March 2009 for the murder of his spouse Earth Adams, occurred in February last year.
The dead woman was found in a grave in Huntsville , Texas. The American press reported several requests for information to the disappearance of the woman eight months pregnant .
Roberts allegedly buried the body of Adams. When his vehicle left the place and a man stuck him assistance . Police started this witness .
Since 2008, Roberts moved to Margarita. He worked in a local assembly security cameras. Bank records and locate SENIAT allowed."