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Four people were arrested Thursday in the murder of “General Hospital” actor Johnny Wactor, police said.

Of the four, three were booked on a murder charge:

  • Robert Barceleau, 18, of Huntington Park
  • Leonel Gutierrez, 18, of Los Angeles County
  • Sergio Estrada, 18, of Los Angeles County

A fourth person, 22-year-old Frank Olano of Inglewood, was booked on a warrant for accessory to a crime.

According to the Los Angeles Times and TMZ, police were investigating members of the Florencia 13 gang tied to catalytic converter thefts in the region.

Wactor’s mother, Scarlett Wactor, told KTLA earlier Thursday that police informed her that at least one arrest had been made in the downtown Los Angeles shooting earlier this year.

Wactor was shot and killed on May 25 when he returned to his car in downtown L.A. to find three men attempting to steal his catalytic converter.

His mother said Tuesday that the actor, who also appeared on shows like “Westworld” and “NCIS,” would have turned 38 later this month.

“Grief is my constant companion,” she said.

Nidia Becerra contributed to this report.