Specifically, they found a little alligator.
The small reptile was on display during a news conference on Wednesday as police detailed the investigation at 1124 Main Street.
Officers say they had been investigating the home since September 8th after getting complaints that drugs were being sold there.
Police went to the home after the September complaint and arrested two people, Niquay Al-Uqdah and Dalton Howell.
Since then, however, police say they continued to receive complaints about heroin sales at the home.
Darby police officers went back to the home and served a search warrant around 4:00 a.m. Wednesday.
Police found a large amount of heroin, unused baggies for packaging, a shotgun and stamps. Police say they also found stamps that were used to identify heroin packages. Those stamps were marked "Lights Out," "First Stop," "Infinity," and "Burberry."
However, the target of the raid, 22-year-old John Pratt, was not there and remains at large.
Police say those stamps indicate Pratt was a wholesaler, meaning he would mark his product and sell those bags to dealers.
"27 years as the boss and I've never seen an operation in which we've gotten the packaging," said Darby Borough Police Chief Robert Smythe.
Police say they did find Pratt's 18-year-old girlfriend, Yvonniea Mincy, 25-year-old Alred McIntyre and a 2-year-old girl.
Anyone with information on Pratt's whereabouts to call 610-586-1100 or 911.