DENVER -- Denver police said Monday they are offering a $125,000 reward for information about the person responsible for gunning down an Adams County prosecutor outside his home.

Deputy District Attorney Sean May was shot in the head and in the left side of his abdomen on Aug. 27.

No one has been arrested, and police have not said whether May was killed because of his work.

"We feel this large reward gives us another tool to bring this to a more timely conclusion," said Dave Fisher, division chief of investigations for the Denver Police Department.

"We don't know if this is related to his job as a prosecutor or not," Fisher said. "We are not ruling anything out."

Fisher said there appears to be little public awareness of the slaying because it happened in the middle of the Democratic National Convention.

"I was disappointed to hear from our detectives who are out on the street talking to people -- who you would think would know something about crime -- being members of the criminal element who we frequently go to looking for information on who did it, to see what rumors are out there. On more than one occasion, we ran into a situation where people we thought would know, their response was unfortunately, 'What are you talking about? What prosecutor?'" Fisher said.

"Understand this happened during the DNC. There was a lot going on. A lot of people are not aware of this killing," Fisher said.

Police said the gunman was probably waiting for May to return home.

The 37-year-old May worked in Adams County but lived in northwest Denver.