TULSA - On Thursday night, 19-year-old Tyrone Woodfork was arrested for the murder of 85-year-old Nancy Strait.
Nancy and her 90-year-old husband Bob Strait were found beaten and left for dead inside their north Tulsa home.
The couple's door had been kicked in. Police say they were victims of a home invasion robbery.
"My mother weighed 90 pounds. My father weighed a little over a 100 pounds," said the couple's daughter Lanora. "They were both in frail health. They would have done whatever was asked (of) them. There was no need to this. He is a monster."
Lanora asked that 2NEWS not publish her last name.
On Thursday afternoon, a tipster spotted the couples' orange Dodge Neon and called 911. The caller stayed on the phone with police and followed the car to a home in the 5700 block of East Easton.
Police say Woodfork was driving the vehicle with two other men and a woman.
All four were questioned by police. So far only Woodfork has been arrested.
Lanora says her family is incredibly grateful to the 911 caller who led police to the suspect.
"That caller put their life on the line," Lanora said. "My thanks to that person for their courage and care. At any moment, (Woodfork) could have noticed he was being followed and turned (on) them."
Lanora says Friday will be spent planning her mother's funeral.
"Your mood goes up and down," Lanora said. "But I am so grateful for all the prayers and support from the people of Tulsa."
Lanora urges more Tulsans to play a role in making their communities safe.
"If this could happen to my parents, this could happen to anyone," Lanora said.
Bob Strait remains hospitalized.