23-year-old Xavier Alatorr was arrested late Sunday in Kansas City, Missouri, according to a news release from the Kansas City, Kansas, police department where the shooting took place.
Police are searching for a second suspect, Hugo Villanueva-Morales, 29, who said he was considered armed and dangerous.
Both were charged with four counts of first-degree murder and their bonds were set at $ 1 million, the release said.
At least 200 people attended an emotional candlelight vigil on Sunday at the Tequila KC Bar in Kansas City, filled with tears of friends and family of victims. Photos of three of the four men killed were laid out by candlelight.
"The families need closure, they have a lot of questions. We just want to know why someone would do it here," said Tony Maciel, whose cousins were among the injured. "There are families here, but you get outsiders … they come and do something like that. It's painful."
Five injured are in stable condition and some are released from hospital, police said.
Celeste Trevino told CNN through tears on Sunday, one of the victims saved her life, pushing her away before being killed.
"I don't feel like I'm ever going to be the same when I see something like that," Trevino said. "It's hard for me to be here because every time I close my eyes, I see it and think about it."
Trevino said she was dancing with the man who saved her life.
"I just remember holding him by his face. And I'm pretty sure he still had my lipstick on his cheek when he died because I remember kissing him on the cheek, "Trevino said, adding that her son-in-law was also among the dead.  The Kansas State Police have not made any arrests in connection with the shooting, and the two men are held to be held responsible. Tequila KC around 1:30 a.m. Sunday (2:20 p.m. ET) fired a handgun and started firing, police said, at that time there were about 40 people at the bar.  The shooting may have stemmed from an argument that had taken place inside the bar hours earlier, Tomasic said. ” class=”media__image” src=”http://cdn.cnn.com/cnnnext/dam/assets/191006170358-kansas-city-shooting-suspects-large-169.jpg”/>