Tents that were taken down on Saturday are back up at the home, and a unit from the Red River Army Depot Fire Department is back on the scene.
NEW BOSTON, TX (KSLA) -
Federal agents are back out at the New Boston, TX home of a couple reportedly under investigation in connection with the ricin-laced letters sent to public officials last week.
The FBI is still not talking, but agents can be seen in and around the home on Maple Street in the Twin Oaks subdivision, along with several people in biohazard suits.
Tents that were taken down on Saturday are back up as well, and a unit from the Red River Army Depot Fire Department is back on the scene.
Federal agents returned to the home late Monday night, and began setting up the tents again early Wednesday morning.
Agents first swarmed the home last Thursday, removing items from the home that included computers. Neighbors identify the man that lives in the home with his wife Shannon and 5 children as Nathan Richardson.
After two days of activity on the property, it was turned over to local authorities on Saturday to keep the scene secure. A New Boston City employee was called to the home to round up the couple's cat, since there was no one there to care for it.
Neither Nathan nor Shannon Richardson have been seen since they were spotted at the federal courthouse in downtown Texarkana on Friday.
All the FBI will say is that the investigation is ongoing and no one is in custody, and no arrests have been made in connection with the activity in New Boston.
A law enforcement official has told the Associated Press that the FBI initiated the search after being contacted by the resident's spouse. The official wasn't authorized to disclose information about the probe and spoke to The Associated Press on Saturday on condition of anonymity.
CBS News has reported that Shannon Richardson told police her husband may have sent the ricin-laced letters to President Obama, New York City Mayor Michael Bloomberg and his Washington D.C.-based gun control group.
Nathan Richardson, in turn, reportedly accused his wife, saying he was set up and that he knew nothing about it. Investigators told CBS News that Shannon Richardson knows specific details about the letters.