A Texas man suspected of killing three people and seriously injuring four in a string of attacks on sleeping Southern California men — most of them homeless — had a long criminal history and had been deported from the United States six times, immigration officials said Tuesday night.

A crime alert is posted as Capt. Billy Hayes, left, speaks at LAPD headquarters Tuesday, Sept. 25, 2018, in Los Angeles. A man arrested on suspicion of beating a Southern California homeless man into unconsciousness and suspected in six other attacks — three of them fatal — also was being investigated in the disappearances of two of the suspect's Texas relatives, officials said Tuesday. (Marcio Jose Sanchez/AP)

This undated photo provided by the Houston Police Department shows Rogelio Escobar who Houston police are investigating the disappearance of along with his sister Dina Escobar in Texas last month. A man arrested on Monday, Sept. 24, 2018 on suspicion of beating a Southern California homeless man into unconsciousness and suspected in six other beating attacks, three of them fatal is also being investigated in the disappearances of Rogelio and Dina Escobar the suspect's Texas relatives. (Houston Police Department via AP)

This undated photo provided by the Houston Police Department shows Dina Escobar who Houston police are investigating the disappearance of along with her brother Rogelio Escobar in Texas last month. A man arrested on Monday Sept. 24, 2018 on suspicion of beating a Southern California homeless man into unconsciousness and suspected in six other beating attacks, three of them fatal is also being investigated in the disappearances of Rogelio and Dina Escobar the suspect's Texas relatives.(Houston Police Department via AP)

This undated file photo from surveillance video provided by the Los Angele Police Department shows a man they are seeking in connection with the assault on multiple homeless men who were brutally beaten with a baseball bat in Los Angeles early Sunday, Sept. 16, 2018. Two of those men have died. Authorities on Monday, Sept. 24, arrested a man on suspicion of bludgeoning a homeless man in Santa Monica, Calif., earlier Monday. He is now being investigated in connection with at least six attacks in both cities that have left three dead. (Los Angeles Police Department via AP, File)

LOS ANGELES — A Texas man suspected of killing three people and seriously injuring four in a string of attacks on sleeping Southern California men — most of them homeless — had a long criminal history and had been deported from the United States six times, immigration officials said Tuesday night.

Ramon Escobar, 47, who was believed homeless himself, likely targeted victims to rob them, Los Angeles police Capt. William Hayes told reporters at a news conference Tuesday.

Escobar could be charged Wednesday with murder and attempted murder in connection with a weekslong string of attacks.

Meanwhile, authorities in Houston investigated him for the disappearance of his aunt and uncle.

Escobar was being held without bail but U.S. Immigrations and Customs Enforcement officials have filed a detainer seeking to take him into custody if he is released, the agency said.

Escobar was first ordered removed from the country in 1988 and was deported to his native El Salvador six times between 1997 and 2011, ICE said in a statement Tuesday night.

He was released from ICE custody last year after appealing his latest immigration case, ICE said but the agency didn’t indicate his current legal status.

Escobar has six felony convictions for burglary and illegal reentry, ICE said.

Hayes called Escobar a “violent predator” and said investigators believe he drove to California from Houston after his relatives disappeared and attacked the men in Los Angeles and suburban Santa Monica beginning Sept. 8. Detectives seized a wooden baseball bat and bolt cutters that police believe he used to carry out the attacks on random victims.

Escobar was arrested Monday after a man sitting on a sidewalk was beaten unconscious and robbed of some of his possessions, Santa Monica police said. That victim remains in coma.

Police will ask prosecutors on Wednesday to charge Escobar with three counts of murder and four counts of attempted murder, officials said.

It wasn’t immediately known whether Escobar had an attorney who could speak on his behalf.

Escobar is a person of interest in the disappearances late last month of 60-year-old Dina Escobar and her brother, 65-year-old Rogelio Escobar, Houston police said in a statement.

Dina Escobar’s burned van was found in Galveston, Texas, a few days after she went looking for her brother. She was last seen Aug. 28, two days after her brother vanished, the statement said.

Texas authorities said they want to talk to him about the disappearances.

Escobar spent five years in prison for robbery starting in the mid-1990s, Hayes said. Records in Texas show Escobar has had arrests for vehicle burglary, trespassing, failure to stop, public intoxication and two assaults, most recently in November 2017. That case was described as a misdemeanor.

Dina Escobar’s daughter, Ligia Salamanca, told KTRK-TV in Houston earlier Tuesday that her cousin, Ramon Escobar, had never come across as violent and wasn’t a source of trouble for the family.

“She loved him as she would a son,” Salamanca said of her mother’s devotion to Ramon Escobar.

Salamanca said he had been looking for work and needed a place to stay, so he was taken in by his uncle, who went missing days later.

Investigators believe Escobar was the man who used a baseball bat to bash the heads of three homeless men sleeping on downtown Los Angeles streets before dawn on Sept. 16, police said in a statement. Two died.

He was recorded on surveillance video ransacking their pockets and belongings.

Two homeless men sleeping on the beach were bludgeoned in the head early on Sept. 8 and Sept. 10, leaving one in critical condition, officials said.

Another man who apparently was sleeping on the beach was found dead under the Santa Monica Pier on Sept. 20. Steven Ray Cruze Jr., 39, of San Gabriel, had been beaten to death.

Authorities at first described him as homeless, but family and friends said the father of two, who loved to fish at the pier, worked boats in neighboring Marina del Rey and sometimes camped out under the pier to avoid the long commute home.