Transcript for Accused Tampa gunman's parents called to testify
We move from politics to the search for a motive in that Tampa serial killer case. This morning we're hearing exclusively from the lawyer for the family of the accused gunman as he faces four counts of murder. ABC's Diane Macedo has new details. Reporter: How could 24-year-old Howell Donaldson turn from a college athlete to an alleged sear Kil of four in a Tampa neighborhood. They said we had a perfect life in America and overnight our world has changed. It's just a nightmare. The father continues to say that he tries to wake himself up from this. Reporter: Donaldson's parents are struggling to understand that question this morning as their lawyer tells ABC news exclusi exclusively they're being called to testify against their son this afternoon. We love our son. We support our son and we just pray for strength for the family members and ask they do the same for us because we all are devastated. It's been difficult for everyone as my wife said. Not only for us but for victims in this case. And our hearts are heavy as their hearts are heavy. Reporter: Friday his heartbroken parents got the chance to see their son in a video chat for the first time since he was arrested. I had to help them get up from their chair because they did not have the strength to stand. Reporter: The suspect's public defender tells local Tampa station WFLA this case will not be resolved quickly. It's going to take a significant amount of labor as well as a significant number of years to go through all of those tips. Reporter: One factor she's not discussing, Donaldson's mental Tate which some say could play a major role in the case. You see kind of two sides of this kid. Could be psychological. He's probably going to go down the road of pleaing insanity and hopefully don't get a death penalty in Florida. It's important to note police still have no possible motive. As for the quick thinking McDonald's worker who called the police on Donaldson she has now collected a $110,000 reward. She may have saved a lot of lives by making that phone call. Got to feel for these parents. And the victims, my goodness. Still so confusing. Thank you.
This transcript has been automatically generated and may not be 100% accurate.