The San Bernardino County Sheriff's Department has arrested two more men in connection with the shooting of a 65-year-old Thursday and is asking the public for help in finding a fourth suspect.

On Saturday, homicide investigators arrested Brian and Brandon Dominguez, 18 and 20, both of Hesperia, after questioning. A fourth suspect, Robert Dominguez, 23, is also being sought by the sheriff's department, and the department is asking for the public's assistance in locating him.

Investigators "continue to believe" the first suspect arrested, Ricardo Real, was the one who fired the fatal shots that killed Seutatia Tausili, 65, and wounded her grandson, Vaovasa Penu, 25, according to department spokeswoman Jodi Miller.

The incident occurred on the 11900 block of First Avenue on Thursday night, at Penu's residence. Penu and his family members spotted a group of "taggers" marking up a trash container on his property with graffiti. Penu and family members confronted the group. The confrontation turned into a fight and shots were fired, killing Tausili and hitting Penu in the leg.

Anyone with information regarding the whereabouts of Robert Dominguez is asked to contact the Hesperia Police Station at 947-1500 or Sheriff's Homicide at (909) 387-3589, Detective Rod Medley or Sergeant Tom Bradford.

Information can also be left anonymously by calling WeTip at (800) 78-CRIME. WeTip informants are eligible for up to $1,000 reward should their information lead to an arrest and conviction.

Beau Yarbrough can be reached at 956-7108 or at beau@hesperiastar.com.