The tearful widow of a man who killed his former daughter-in-law and another woman at a Delaware courthouse before fatally shooting himself says she had no idea he was planning the violent rampage.

Lenore Matusiewicz told The Associated Press on Thursday that she told her husband Tom, a former New Jersey police officer who often carried a pistol, to leave his guns at their Texas home before they drove to Delaware last week.

Mrs. Matusiewicz also said her son, David, did not know his father brought a gun to Delaware.

Authorities said in a search warrant affidavit that investigators suspect both Lenore and David Matusiewicz helped to plot Monday's slaying of David's ex-wife, Christine Belford at the New Castle County Courthouse in Wilmington, Del.