Toxicology results released Thursday show that the Georgia toddler who died after being left by his father in a hot car last month had not been drugged or sedated.

From 11 Alive news in Atlanta:

Details of the toxicology report of the 22-month-old boy who died after his father left him in a hot car in Cobb County have been released.

Cooper Harris had no medications and no sedation agents given to him on the day of his death, according to the report.

The boy’s father, Ross Harris, is charged with felony murder and cruelty to a child in the second-degree in the June 18 death.

Experts say the clean toxicology report doesn’t help the prosecution because it reduces their ability to argue that the death was premeditated. However, the results are not pivotal in the case, according to experts.

Investigators continue to work on the case, after preliminary information was presented during a probable cause hearing last week. Details revealed during that hearing indicate that Ross Harris was allegedly sexting other women while at work on the day his son died. Investigators also revealed details of Harris’ online search activity, which is said to have included searches on Georgia laws on the age of consent and “how to survive prison.” Police also said Harris twice watched a public service announcement video about hot car deaths, and that both Harris and his wife had researched hot car deaths online.

While the wife of Ross Harris, Leanna Harris, has not been charged in the case, it was also reported Thursday that she has hired Cobb County, Georgia defense attorney Lawrence Zimmerman.

[Featured image: 11 Alive video]