The 18 geese appeared to have been beaten and shot in the head.
Mount Laurel Mayor Jim Keenan called the attack "disgusting'' and "a horrendous act against the animals.''
Cramer took three injured birds to a wildlife refuge in Medford.
Police Chief Dennis Cribben Jr. says anyone charged with killing the geese faces a third-degree cruelty to animals charge. A conviction includes fines up to $15,000 and three to five years imprisonment.
In New York, authorities kill geese in an effort to reduce the potential for bird strikes at area airports, but it's done far more humanely. Last week, wildlife biologists and technicians from the United States Department of Agriculture captured and euthanized nearly 400 Canada geese and goslings.
It wasn't clear what, if any, purpose the cruel slaughter of the geese in New Jersey intended to serve.