Lana Taneff, 64, was found dead in the family's home on Sunday. The body of 86-year-old Velia Taneff was found at her rental property next door on Taft.
"Autopsy results determined both women died of result of strangulation and blunt force trauma," Lake County Sheriff John Buncich said.
WLS-ABC7 reports investigators said the handyman of the Taneff family is linked to their deaths. Investigators said the nephew of the person of interest went to police on Saturday, fearing that the two women might be hurt.
Velia Taneff used to host a radio show on WLTH 1370 AM in Gary IN, and she had recently started video blogging.