timothy fradeneck , 38 , appeared in court on wednesday as he was arraigned on first-degree murder and child abuse charges .
fradeneck 's wife christine , 37 , their 2-year-old daughter celeste and 8-year-old son timothy iii were found dead in their home on monday .
when police searched the home , fradeneck allegedly confessed to strangling all three with a usb cord .
in court on wednesday , fradeneck was emotionless through the proceedings and prematurely tried to enter an insanity plea .
if convicted on the charges , he could spend the rest of his life in prison .