One man turned himself into Allegheny County police this afternoon, while they search for a second man in connection with the shooting deaths of two men in Duquesne on Monday.
Michael Robinson, 26, of Duquesne surrendered this afternoon. He was charged with two counts of homicide and weapons violations and is being held at the Allegheny County Jail, where he is awaiting arraignment.
Detectives have obtained an arrest warrant for Glenn Smith, 27, of Duquesne, for weapons violations, receiving stolen property, tampering with evidence and other charges in relation to the killings of Tyrone Coleman and Laurence Short.
The charges stem from a foot chase after the homicides when detectives tried to question Mr. Smith and he ran.
Mr. Smith is 5-feet-7 and 140 pounds and is also known to frequent West Mifflin and McKeesport.
Police said Mr. Short, 29, of Clairton, and Mr. Coleman, 18, of Duquesne, were shot to death about 5:45 p.m. Monday in the 600 block of Crawford Avenue.
"We believe a potential motive for this shooting was an ongoing dispute between Laurence Short and Michael Robinson," said Lt. Andrew Schurman of the Allegheny County police homicide unit.
Asked if Mr. Coleman might have been at the wrong place at the wrong time, Lt. Schurman said, "That's a possibility."
Mr. Robinson's uncle, Aaron Robinson of Lake City, Fla., said his family back home wants to make clear that the deaths weren't in retaliation for anything. He said when police cite a purported rivalry, he thinks they're referring to the unsolved 2008 shooting death of David Daniels, Michael Robinson's half-brother.
"David was shot, but we don't know who shot David, and we're not out there trying to eliminate people hoping to finally get the trigger man," Aaron Robinson said.
Laurence Short, who family called Gregory, was a father of four who was pursing carpentry and leaving the missteps of his early 20s behind him, according to his uncle Carey Short of Penn Hills.
During part of late teens and early 20s, Laurence Short had been involved in drugs and had also spent some time in prison, his uncle said.
But the young man hadn't been incarcerated in years, he said, and he "wasn't just another dope-dealing kid out here."
"It's just very neat and tidy and easy to sum it all up to say he was involved in drugs," Carey Short said. " ... He really worked very hard to try to remove himself from those types of things."
Correction, posted May 8, 2013: In an earlier version of this story Laurence Short's first name was misspelled.
Torsten Ove contibuted to this report. First Published May 8, 2013 4:30 AM