Charles Conklin, pictured left, told DailyMail.com that Kohberger lasted just 20 days at his fishing lake as he was so unskilled at fileting fish, while the loner was also difficult, withdrawn and shy .
Kohberger is charged with four counts of first-degree murder and one count of felony burglary in connection with the killings of four college students.
The mother of Idaho murder victim Ethan Chapin on Monday reflected on what she described as a "challenging time" sending two of her three triplets back to the University of Idaho after Ethan's Nov. 13 death.