The bear, weighing nearly 600 pounds, was at least 10 years old, wildlife conservation officer Dave Allen said.
"It's a senseless waste," he said..
Customers and employees of the High Elevations restaurant in Kidder Township had seen the bear for years and had nicknamed it "Teddy."
Patrons often called to ask what time the animal would appear, employee Lisa Fisher said.
"He was so calm and big. People would sit in the parking lot or watch him from the windows of the restaurant," Fisher said. "He would eat out of the Dumpster, but he never caused a problem."
The bear made its final visit to the garbage bin Wednesday, when it was shot with a crossbow, stumbled 25 yards, and collapsed in a parking lot, wildlife officials said.
"Whoever did it knew we are closed on Wednesday," Fisher said. "Everyone is very upset here."
The Game Commission has a few leads on the poaching, but on Friday asked the public for help. Black-bear hunting season does not begin until November.
"A bear this size is a trophy of a lifetime," said Tim Conway, spokesman for the commission's Northeast region office in Dallas. "It's one of the largest ones I've seen poached in this area during my career."
The poacher could be fined $500 to $1,500 and ordered to pay restitution between $800 and $5,000, Conway said.