18-Year-Old Slain Trying to Break Up Parents’ Fight : Violence: The youth is San Diego’s eighth homicide victim in four days. An investigation continues into police slaying of a man at an Encanto bar.

An 18-year-old City Heights man who was fatally shot Monday as he tried to break up a fight between his mother and father became San Diego’s eighth homicide victim in four days, police said.

The family argument turned deadly shortly after midnight when Nolan Paul Jackson Jr. was shot in the chest at his home in the 4600 block of Thorn Street as he tried to stop his estranged parents from fighting, police spokesman Bill Robinson said.

The man’s father, Nolan Paul Jackson Sr., 37, was being sought in connection with the slaying and was believed to be armed, Robinson said. The elder Jackson is also suspected of assaulting his wife, Beverly, who received head injuries that required medical attention.

So far this year, 64 homicides have been reported in San Diego, Lt. John Welter said Monday. Last year, the city’s death toll didn’t reach that figure until the end of May. The 167 homicides in 1991 set an annual record for San Diego.

“If we continue at this rate, we’ll exceed last year’s record,” Welter said.

Meanwhile, detectives are continuing their investigation into the slaying by police Sunday of a man at an Encanto bar, Robinson said. The man, who has not been identified, entered the Lomita Club in the 6400 block of Imperial Avenue about 6 p.m. and began to throw bottles and harass customers, police said.

Frightened by the man’s increasingly violent behavior, the patrons and manager fled, Robinson said. A pair of San Diego police officers armed with Taser guns entered soon after.

They saw the man pop up from behind the bar, Robinson said, then pour a bottle of beer over his head. He then threw a bottle against the wall, and officers told him in English and Spanish to stand still as he began to move his hand below the bar, Robinson said.

Officers then fired at him with a Taser, which had no effect on the man, Robinson said. Police fired again, and the man threw a beer bottle at one of the officers, hitting one of them in the head, he said.

One of the officers then fired a single round from his service revolver, fatally wounding the man in the chest, Robinson said.

Lt. Paul Ybarrondo said the officers were uncertain whether the suspect was armed because he was standing behind the bar.

The identities of the officers have not been released. The officer hit by the bottle received minor injuries and was not hospitalized, Robinson said.