Police from Suffolk County and New York City swarmed an East Islip home Tuesday and began digging up the backyard.

Cold case detectives from the NYPD and homicide detectives from Suffolk County joined the crime scene unit in digging up a backyard at 28 Melanni Place. Police first began digging with shovels, but brought in a back hoe around 3 p.m. Police dogs were also spotted on the property.

Sources tell News 12 Long Island that detectives were searching for evidence from a 28-year-old missing persons case. They say 15-year-old Brenda Crowley went missing in 1980. According to Crowley?s sister, the teen was splitting her time between the East Islip home and a Staten Island home in 1979.

Investigators did find one bone in their search, however, it is unclear if it is a human bone.

The NYPD and Suffolk County detectives will not comment on the case.