Sacramento police have arrested a 26-year-old man in connection with Sunday’s deadly mass shooting, the city's police chief confirmed. Dandrae Martin was taken into custody and booked on charges of assault with a firearm and being a prohibited person in possession of a firearm, police Chief Kathy Lester told KCRA 3’s Ty Steele in an exclusive interview Monday morning.“Right now that’s really all we’re able to share about him," she said. "As you know this is a complex investigation and we’re looking for multiple suspects and so we’re currently working to identify what his role was the night of the shooting." A press release from the department referred to Martin as a "related suspect." Sacramento Police Department SWAT members and detectives also served search warrants at three residences in the area. At least one handgun was recovered, police said. Sacramento County District Attorney Ann Marie Schubert noted in a statement Monday that Martin had not been arrested for homicide. "The investigation is highly complex involving many witnesses, videos of numerous types and significant physical evidence," she said in a statement. "This is an ongoing investigation and we anticipate more arrests in this case. Our ethical obligations as prosecutors prevents us from commenting about the specifics of the case. We will be reviewing the evidence provided to our office and making a determination of what, if any, charges are appropriate. If charges are filed, the complaint will be released to the public."KCRA 3 Investigates learned Martin has had previous run-ins with the law.Martin has been wanted in Riverside County since 2015. Jail records show he has an outstanding warrant for a misdemeanor domestic violence charge.According to court documents, Martin “inflicted bodily injury resulting in a traumatic condition” to his spouse.Martin pled guilty to the charge in 2014 and was sentenced to 30 days of custody and 36 months of probation.The Riverside County District Attorney's Office confirmed to NBC News that Martin later violated two terms of probation: the community service requirement, and the 52-week class requirement.A $5,000 bench warrant was issued by the court in 2015.KCRA 3 Investigates also learned Martin spent time in an Arizona prison. He was released in 2020 after serving just over a year-and-a-half for violating probation in separate felony convictions for attempt to commit aggravated assault in 2016, and a conviction on a marijuana charge in 2018.Martin is being held in the Sacramento County Jail without bail and is scheduled to be in court on Tuesday. | VIDEO BELOW | Sacramento Police Chief Kathy Lester gives an update on the shooting investigation.Six people were killed and 12 other people were hurt by gunfire that broke out early Sunday following a large fight downtown, Lester said. She said that multiple shooters were believed to be involved in the violence and a stolen handgun was recovered from the scene.Lester said Monday that police now know that at least three buildings and three cars were hit by gunfire and more than 100 bullet casings were recovered from the scene. "So we know that there were a lot of shots fired that night and hence the complexity of the investigation," Lester said. She said police are still searching for multiple shooters. The coroner’s office in Sacramento County identified the three men and three women who were killed on Monday as:Johntaya Alexander, 21Melinda Davis, 57Sergio Harris, 38Joshua Hoye-Lucchesi, 32Yamile Martinez-Andrade, 21DeVazia Turner, 29Lester said Sunday that investigators were poring over more than a hundred pieces of evidence as well as footage from a police camera at 10th Street and K Street that captured video.“Gun violence is truly a crisis in our community and has increased not only here in Sacramento but across the nation,” Lester said.President Joe Biden and California state and local leaders have also condemned the shooting.Lester said Monday that she was "really proud of our team." "They have worked on this nonstop since the shooting first happened," she said. Asked whether the community is safe with possible shooters at large, Lester said she did believe that was the case. “But obviously, we do need to get the people that were responsible for this horrific act into custody,” she said. | RELATED | Video: 76 shots fired in 54 seconds during Sacramento mass shootingEditor's Note (April 4, 2022): Sacramento police initially provided the wrong spelling for Dandrae Martin's first name.