A Fairfax County Circuit Court jury has convicted William Paris, 36, of first-degree murder in the June 10 shooting death of a 44-year-old county resident who had been living with Paris' estranged wife.

Paris, a resident of 2916 Furman Lane and operator of a delivery service, had pleaded not guilty to the charge and testified that he had no recollection of the shooting.

The jury which convicted him recommended he be sentenced to 20 years. He will be sentenced by Judge William G. Plummer on Nov. 2.

The jury, composed of six men and six women, deliberated for 2 1/2 hours Wednesday night without reaching a verdict. Another two hours of discussions were conducted Thursday morning before a decision was reached. Defense counsel Michael Cassidy said Paris would appeal the verdict.

According to testimony, Paris' estranged wife, Betty, had been living with the victim, Max Walls, 44, at his 6614 Boulevard View apartment when the shooting occurred.

Paris' 16-year-old daughter testified her father had telephoned her prior to the shooting and said "'Tell Max when he gets home, I'm going to kill him.' I didn't call the police. I didn't take the threat seriously."

Paris testified that he remembered little of the shotting. "Max was sitting there on the couch grinning," he said. "The next thing I knew I was talking to the police."

Prosecutor Robert H. Horan Jr., then produced police tape transcript of what he said was Paris' telephone conversation with police immediately after the shooting.

The caller in the transcript said "I just shot a guy . . . I shot him six times . . . Have the cops come on over."