Hey Bronx. Cacace was always "in the mix as a suspect" (Gang Land News) but you gotta remember wiseguys don't kill cops. Gus Farace was murdered for it. Here's a Gang Land News article from Sep. 10, 2009:

Who killed Police Officer Ralph Dols?

The feds say the 1997 murder in front of his Sheepshead Bay, Brooklyn home was a mob hit, one that was ordered and orchestrated by a jealous high-level mobster who was outraged that the young, muscular housing cop had married the wiseguy’s ex-wife.

But could Russian organized crime figures have done it?

In the days after Dols’ slaying, that’s what scores of witnesses and tipsters – including confidential police and FBI informers – were telling detectives investigating the execution slaying.

Time and again, for one seemingly valid reason or another, numerous Russian gangsters were fingered for the slaying and investigated by police, according to court papers filed in the pending murder case against imprisoned Colombo consigliere Joel (Joe Waverly) Cacace and two mob underlings.

Within hours of Dols’ death, for example, police were told by a confidential informant that a Russian hoodlum had killed Dols because the cop was putting pressure on his “drug dealing operation,” according to a 10-page-long government summary of suspects and possible motives that was filed in Brooklyn Federal Court last week.

The tip quickly gained credence with police. First, detectives established that Dols had caused the Russian hoodlum’s arrest a few weeks earlier when he spotted him waving a gun at the Cozy Tavern, a bar across the street from the cop’s home. Then, Dols’ widow reported that her husband had become “very upset one night” soon after when he spotted the gunman in the neighborhood.

Like the Cozy Tavern tip, many of the 12-year-old leads – which authorities now say were wrong – portrayed the housing cop’s murder as retaliation for stellar police work. But several investigative leads, which officials also state were erroneous, had Dols being killed over disputes with various unsavory characters involving “narcotics and steroids allegations.”

Even while police were investigating allegations involving Russian organized crime figures, “Cacace was always in the mix as a suspect,” said one law enforcement source, who noted that the 10-page letter dealt only with information that did not link Joe Waverly (left) to the murder.