SACRAMENTO, Calif. • A second suspect arrested Tuesday in connection with the mass shooting that killed six people in Sacramento had posted a live Facebook video of himself brandishing a handgun hours before gunfire erupted, a law enforcement official said.

Smiley Martin, 27, who is the brother of the first suspect taken into custody, was arrested while hospitalized with bullet wounds from the shooting in California’s capital.

Martin was released from prison on probation in February — less than a year after prosecutors implored the state parole board not to release him early from a 10-year sentence, noting convictions for possessing an assault weapon, thefts and beating a girlfriend he encouraged to be a prostitute.

“Martin’s criminal conduct is violent and lengthy,” a Sacramento prosecutor wrote in a letter obtained by AP. “Martin has committed several felony violations and clearly has little regard for human life and the law.”

Authorities are trying to determine whether the weapon seen in the video was used in the shooting, said the official, who was briefed on the investigation but was not authorized to publicly discuss details and spoke on condition of anonymity.

Investigators believe the brothers possessed stolen guns.

They are reviewing financial documents, call records and social media messages to determine how and when they procured weapons, the official said.

Authorities have searched several locations in connection with the shooting and the firearms investigation.

More than 100 shots were fired early Sunday near the state Capitol, creating a chaotic scene with hundreds of panicked people trying desperately to reach safety. Twelve people were wounded by gunfire, including the Martin brothers.

Dandrae Martin, 26, was arrested Monday as a “related suspect” on charges of assault with a deadly weapon and being a convict carrying a loaded gun. He was not seriously wounded and made a brief appearance Tuesday in Sacramento Superior Court wearing orange jail scrubs.

Smiley Martin will be booked for possession of a firearm by a prohibited person and possession of a machine gun when his condition improves enough for him to be jailed, a police statement said.

A stolen handgun found at the crime scene had been converted to a weapon capable of automatic gunfire.

Smiley Martin was taken to the hospital from the crime scene, police said.

“Smiley Martin was quickly identified as a person of interest and has remained under the supervision of an officer at the hospital while his treatment continues,” the statement said.

A photo of De’vazia Turner is surrounded by candles Tuesday at a memorial near where he was killed in a mass shooting Sunday in Sacramento, Calif.

the associated press