Alexander Solomon, 24, was arrested in Philadelphia after fleeing police in Upper Darby for an alleged armed robbery and carjacking on Tuesday night.
Officials tell Action News that Solomon may be responsible for more carjackings, including one on Monday. The vehicle taken in that crime may have been used in the murder of 22-year-old Corey White, police said.
White was shot and killed in the 5100 block of Hadfield Street in West Philadelphia around 7:45 p.m. Monday.
At a news conference on Tuesday afternoon, police said it began when two men pulled up to White in a car. One man got out, got into an argument with White and shot him in the chest.
Police say the car used in the murder had been stolen from 69th Street Station during the day and was found on fire in Yeadon, Pa.
Solomon is now being investigated in connection with that theft.
White's murder came just hours after the mother of White's baby and another man appeared in court in connection with an alleged plot to kill him this past spring.
20-year-old London Eley is accused of posting a message on Facebook that offered $1,000 to anyone who killed White.
A defense lawyer argued that Eley was only venting when she posted the online message after an argument with White.
Police say 18-year-old Timothy Bynum, of suburban Darby, accepted the offer and asked for details about the target.
"I will pay somebody a stack to kill my baby father," Eley wrote in a post this spring, according to a police affidavit.
"Say no more ... what he look like ... where he be at ... need that stack 1st," Bynum wrote back, police say.
Eley exchanged messages with Bynum for about an hour but never met him or took any other steps to carry out the plan, according to her lawyer, Gerald Stein.
A city judge on Monday approved a murder solicitation charge and a weapons charge - with the computer being considered the weapon - against Eley and approved murder conspiracy and weapons charges against Bynum. Police say they found several weapons in Bynum's home, although Stein said he believes one was lawfully licensed to a parent and another was a BB gun.
Both defendants remained in custody Monday, with bail reduced from $50,000 to $35,000 for Eley and from $75,000 to $50,000 for Bynum. They are due back in court for arraignment on Sept. 6.
The Associated Press contributed to this report.