The ransom note called the parents by their family nicknames, leading police to focus on friends and acquaintances, Montgomery County District Attorney Risa Ferman said. The parents were never again contacted for money as the search for the missing infant stretched through the week.
"We had been hopeful that Saanvi was still alive," Ferman said on Friday. "Tragically, that is not the case."
Authorities instead found the infant in a bloody white dress beneath a bench near the sauna of the fitness center at the sprawling apartment complex where Yandamuri and the victims lived.
Yandamuri had been interviewed on Thursday as police canvassed the family's friends. He told police that he had printed nearly 200 missing-child posters at work, distributed them and attended a vigil for the baby.
But he later detailed the botched crime to police and said he had stolen jewelry, some of which he threw in the nearby Schuylkill River, the affidavit said.
Image: These series of undated photos provided by the Montgomery County District Attorney's Office show Saanvi Venna.