The Douglas County Sheriff’s Department has confirmed that the deaths of 54-year-old Maureen Flanagan and her 18-year-old son Cooper were the result of a murder and suicide.

Their bodies were found in their home near 155th and Blondo on July 16th.  The Sheriff's department says Maureen Flanagan’s body was found in the basement and died of head injuries. Her skull fractures were consistent with a hammer found in the home.

Cooper Flanagan’s body was found in a vehicle parked in the garage. Autopsy results indicate he died from carbon monoxide poisoning.

Toxicology reports have also revealed the presence of cannabis, alcohol, hydromorphone and amphetamine in Cooper Flanagan’s system at the time of his death.

Autopsy results could not establish a time of death, however investigators say Maureen Flanagan was likely dead for several days before her body was discovered.

The investigation could not conclusively determine a motive for the homicide, however, in the months leading up to the homicide, several potential stress-inducing events were identified, including:

The death of Maureen Flanagan’s father

Maureen Flanagan’s declining health

Cooper Flanagan’s transition out of the home and into college

Cooper Flanagan’s arrest for MIP, careless driving, speeding and carrying a concealed knife

Cooper Flanagan’s drug use.