and that's what i miss most about him. >> since they were arrested, dimauro has seen link only once during a court hearing. >> when i went to court, my son david did a heart motion. like this. he put his hands like this in a heart shape and he said that he loved me. he couldn't speak out loud but he motioned his lips i love you. it made me just burst out crying. >> link has accepted a plea deal for his role in the murder and could be called to testify against his mother and ackerman. >> i don't want to testify against no one but i've always been a firm believer that the truth will set you free and everything. this crime was against my morals. so the easiest way for me to fight that in my mind was just tell them the truth about exactly what happened. >> his testimony could send his mother to prison for years.