The discovery was made around 2:30 Sunday afternoon on the 300 block of South Wayne Avenue.
"We believe the person who committed the murder-suicide, the husband, made the call prior to shooting himself," said Bill Colarulo, Radnor Township Police.
Supt. Colarulo says they received a 911 call after 2:00 p.m. Police believe the husband called for help after allegedly shooting his wife.
After the call is when authorities believe he turned the gun on himself.
Investigators say the murder-suicide happened in a pool house, which is adjacent to the family's home.
The couple left behind three children. At least one of the couple's children was inside the main part of the home at the time.
"There was one child at home, an 8-year-old boy in the house, another sibling, a 17-year-old came home. We do believe the deceased are the parents and they have another child in another state," said Supt. Colarulo.
The motive is still in question. Police believe a 357 magnum found at the scene was used for at least one of the shootings.
As authorities work to answer why, neighbors are still trying to grasp that such a violent crime happened in their area, where murders are incredibly rare.
"The only time you see police is when someone runs a stop sign and they're catching you for it," said Andy Sterge.
Meanwhile, autopsies are expected to be completed this week.
