Shawnee Police arrested a mother and her boyfriend in connection to the death of a toddler, Tuesday.
Authorities identified the suspects as 21-year-old Whitney Breslin and 22-year-old Cashe Graham.
On Friday, police say Graham called 911 to report that 2-year-old Jamie Murdock was having trouble breathing.
When emergency responders arrived at the home in the 1200 block of East Highland the toddler was unresponsive.
Once at the hospital, doctors determined she had swelling and bleeding on the brain, according to police reports.
The toddler was first treated at St. Anthony hospital in Shawnee, but was later transferred to Children's Hospital in Oklahoma City.
She passed away from her injuries, Saturday.
Police say the doctors pointed out a bruise on the toddler's face and bruising on her abdomen.
"According to their story, they went in to check on her and she was having trouble breathing," Detective Jason Crouch says the couple denies knowing how the little girl sustained the injuries.
The doctors said her symptoms would've appeared with in an hour of the injury.
"It just tells us there is a really small window as to who is responsible for this," Crouch said the mom and boyfriend admitted they were the only two there during that time.
What's more, police say, this was Murdock's third trip to the emergency room in a month's time.
She had two recent head injuries that the couple allegedly blamed on accidents.
"The mom and boyfriend said that she is a sleep walker and that she falls down," Crouch said her most recent injuries were not consistent with any accident.
A police report notes the toddler died from a "non-accidental abusive head trauma"
The report also indicates the two-year-old tested positive for marijuana. Police say the amounts indicate she would've ingested the drugs, not secondhand smoke.
The couple admitted to keeping marijuana in their home, according to a police report.