Officers arrived at the home on the 6300 block of Genoa Road and searched for her.
Anne Arundel County Police reportedly found Koilpillai's body outside. She was pronounced dead at the scene and it was deemed a homicide, the statement said.
Anne Arundel County Police said they believe the murder was "a targeted incident and not a random act of violence."
After an autopsy, the Office of the Chief Medical Examiner ruled Koilpillai's death as multiple sharp force injuries in the manner of homicide, according to Anne Arundel County Police.
In an update, the police said Koilpillai's vehicle — which was missing from her residence — was found in Leesburg, Virginia, on July 26. Her 23-year-old son Andrew Weylin Beavers was identified as a person of interest. Beavers allegedly had a "fresh laceration on his right hand in which he would not explain," police said.
Anne Arundel County Police said Beavers allegedly drove to Virginia after murdering her and leaving her body outside.
The car was brought back to Anne Arundel County and investigators examined evidence, including the weapon they believe was used to kill Koilpillai.
He was arrested in Leesburg on charges of first and second-degree murder and is awaiting extradition to Anne Arundel County.
The Capital Gazette reports Koilpillai was an accomplished cybersecurity professional. She reportedly worked on FEMA's enterprise security management team and was a principle investigator for U.S. Department of Defense initiatives. Koilpillai had reportedly been in the profession for over 30 years and also loved mentoring young women.