Prince George's County Police yesterday announced the arrest of six persons, including a District of Columbia police dispatcher, who were described as members of a cocaine drug ring that investigators said was engaged in a narcotics operation that grossed nearly $1 million a month.

Police said the six suspects were arrested Friday, but information about the arrests was withheld pending issuance of five additional arrest warrants yesterday for other suspects.

The arrests were made following a six-month investigation and a six-week court-ordered wiretap of the home of Amos Steve Tinker, 48, of 652 Fairview, Takoma Park, who police described as the leader of the ring.

Lt. Donald Greenfield, of the Prince George's police, confirmed the estimate of the scope of the operation.

Prince George's police said that during the wiretap of Tinker's phone, it was feared that a D.C. police communications dispatcher, Officer Ellen P. Bolden, might be tipping off members of the ring about the investigation, police said.

"She was in a position so that she could spot anything suspicious - our surveillance of suspects or even a request for a check on a license tag, and relay that to the ring," a police source said.

D.C. police [WORD ILLEGIBLE] Bolden, 28, of Bradbury Heights, Md., a member of the department for four years, has had her police powers revoked and a suspension is pending.

Both Tinker and Bolden were charged with conspiracy to violate the Controlled Dangerous Substance Act. U.S. District Court Judge James M. Rey reduced Tinker's bond from $500,000 to $200,000 and Bolden's from $50,000 to $10,000. Both were jailed in lieu of bond.

Also arrested and charged with conspiracy Friday were Tinker's son, Daniel, 26, of 1408 Iverson St. Hillcrest Heights, who was jailed in lieu of a $50,000 bond, and Dya Chia Godfrey, 23, of 1101 3d St. NW, an employee of the D.C. Office of Youth Advocacy. Godfrey was jailed in lieu of a $10,000 bond.

Prince George's police also arrested Harris Ramsey, 29, of 9525 Fort Foote Rd., Oxon Hill, who was charged with intent of distribute cocaine and maintaining a common nuisance. Ramsey was jailed in lieu of a $50,000 bond.

Drug Enforcement Administration agents arrested Denise Catherine Hackett Friday in connection with the drugs operation. Prince George's Police said that Hackett was a fugitive from an earlier charge of conspiracy to violate the Controlled Dangerous Substance Act.

Seized during the arrest Friday was $34,000 worth of cocaine, $1,000 worth of hashish, about $2,200 in cash, a 1977 Cadillac belonging to Bolden and numerous drug paraphernalla, Prince George's police said.