Concerned, they alerted the police, who, upon arrival, observed the snow-free roof and suspected an unusual heat source.
After obtaining a warrant, officers uncovered a hidden cannabis farm inside.
The grow lights and ventilation system generated enough heat to keep the roof snow-free, revealing the secret operation. Police seized the plants and equipment, arresting the Johnsons. The neighborhood was left in shock, realizing the hidden activity concealed in plain sight.