The Prince George's County grand jury has begun an inquiry into the circumstances surrounding the early parrole and the federally funded employment of a man accused of murdering a 12-year-old Clinton boy last month.

Scheduled to appear before the grand jury on Wednesday is Dwarka Goswami, fiscal officer for the county's Comprehensive Employment and Training Act (CETA) program which is financed by the federal government. Charles M. Wantland, the 40-year-old suspect charged in the youth's death, was working on a project paid for with county CETA funds.

"It's only an inquiry, not even an ivestigation," county personnel director Donald H. Weinberg, who was responsible for the CETA project, said yesterday. "There have been no improprieties on our part."

State's Attorney Authur A. Marshall Jr., whose office works closely with the grand jury, could not be reached yesterday for comment.

Weinberg said he and two aides appeared before the grand jury three weeks ago in connection with the slaying of Donald Alan Henley, who was found stabbed 14 times a mile from his suburban home on June 18.

Wantland, paroled three weeks earlier after serving five years of a 30-year sentence for second degree murder, was arrested shortly afterward and charged with killing Henley.

Wantland had been employed as a carpentry instructor and security guard by Capitol Building and Remodeling Co. The firm, according to Weinberg, was under contract with the county to renovate the school board-owned Berger Mansion in Clinton. Under the contract Capitol was to use 14 prisoners to be released from Jessup State Penitentiary and 30 other unemployed persons to do the job.

Since Wantland's arrest, County Executive Winfield M. Kelly Jr. has suspended the CETA-funded work at the Berger Mansion. The 44 individuals in the program are now receiving training at Jessup and Bowie State College, Weinberg said.