( CNN ) -- A Texas man killed four women -- including his girlfriend and a woman he was dating -- and wounded three teens and a boy in shootings at two Dallas-area homes , police said Thursday . The man was arrested at the second home after a child there called 911 , according to police . When the shootings were done Wednesday night , there were two slain women and two wounded minors at each location -- one in Dallas and the other in DeSoto , roughly 15 miles to the south . Authorities identified those killed as Zina Bowser , 47 , Neima Williams , 28 , Toya Smith , 43 , and Tasmia Allen , 17 . They said the suspect in the shootings is 44-year-old Erbie Bowser , who was dating Smith . Zina Bowser was Bowser 's estranged wife , they said . When asked about a possible motive , DeSoto police spokesman Nick Bristow said that authorities believe `` it just to be an isolated domestic issue . '' The Dallas Mavericks said Bowser used to be a member of the NBA team 's Mavs ManiAACs , an all-male hip-hop dance troupe that entertains fans at games . He left the squad in 2009 , Mavericks spokesman Scott Tomlin said . Bowser was a special education teacher for Mesquite Independent School District east of Dallas from December 2001 through March 2010 , last teaching at Berry Middle School , district spokeswoman Laura Jobe said . He resigned and `` left us on good terms , '' she said . CNN 's attempts to contacts Bowser 's relatives were n't immediately successful . Relative had bad feeling after call . Authorities learned of the Dallas shootings at 10:30 p.m. , when relatives found the carnage there and called 911 , police said . Beforehand , one of the victims had talked to her mother on the phone . Something about the conversation concerned the mother , so after calling back and getting no response , she drove with some family members to the Dallas home , where they saw the four who had been shot , Dallas police Maj. Jeff Cotner said . Toya Smith and her 17-year-old daughter were dead inside the house . Injured were the woman 's 14-year-old son and a 17-year-old girl who was a family friend , Cotner said . The 14-year-old was in critical condition Thursday . Dallas police had reason to suspect the gunman might have a DeSoto connection , and called DeSoto police , Cotner said . Minutes later -- at 10:45 p.m. , while police were traveling to check the DeSoto home -- a child called 911 to report the shooting there , DeSoto police spokeswoman Melissa Franks said . The gunman had used `` some sort of explosive device , '' and then shot at the people inside , Franks said . Zina Bowser and Neima Williams were killed there , and two boys -- ages 11 and 13 -- were injured , she said . Both were in critical condition Thursday . Police arrested the suspect there without incident , she said . Dallas and DeSoto investigators are working together on the case . The U.S. Bureau of Alcohol , Tobacco , Firearms and Explosives is investigating the nature of the explosive device , Franks said . No explanation for Florida shooting rampage that leaves 7 dead . CNN 's Paul Caron , Tina Burnside and Ben Brumfield contributed to this report .
Police say man killed four women ; one was a girlfriend , another an estranged wife . They identify the suspected gunman as 44-year-old Erbie Bowser . The shootings happened at two Dallas-area homes . Three teens and an 11-year-old boy were hurt in shootings .