Further investigation into the Delaware courthouse shooting is underway. A search warrant is issued on Feb. 13, to search the Texas home of the accused gunman, Thomas Matusiewicz.
Matusiewicz killed his former daughter-in-law in a Delaware courthouse. Police suspect that Matusiewicz's wife and son may have been involved in the murderous plot.
Delaware State Police said Thomas Matusiewicz, 68, walked into the lobby of the New Castle County Courthouse in Wilmington on Monday and shot and killed Belford, 39, and her friend Laura Mulford, 47, before taking his own life.
ABC News reports, "Matusiewicz complained in a 2011 letter to a Delaware Superior Court judge that he and his family had no money to defend themselves in a lawsuit filed by Christine Belford after her ex-husband, David Matusiewicz, kidnapped the couple's three daughters and took them to Central America."
At the time Matusiewicz drafted the letter, his son David, was incarcerated in a federal prison, convicted of kidnapping and fraud. David Matusiewicz pleaded guilty in 2009 to federal fraud and kidnapping charges after fleeing to Nicaragua in a motor home with his mother and the three girls.
In Matusiewicz's letter he claimed that he and his family, spent nearly one million dollars to secure the safety of their granddaughters. The gunman said that the children's mother is under the care of a mental health professional, and that is the reason why his family feared for the children's safety.
Reportedly, Texas authorities said in an affidavit that "Thomas Matusiewicz, his wife and his son were all suspected of "intentionally and knowingly participating in a murder."
With a search warrant in place, no other arrest have been made in the case.