Investigators have linked the gun found at the scene of the subway shooting to suspect Frank James, according to law enforcement officials.
Three law enforcement officials told CNN that investigators have determined the gun recovered from the scene of the subway shooting was purchased by James.
Two of those officials said linking the gun to James was part of the impetus in elevating James from a “person of interest” to a suspect in connection with the shooting.
Investigators are learning more about the purchases that James made as they pour over evidence, including search warrants, sources said.
Authorities have tracked the purchase of a gas mask to James through an eBay account, according to one of the aforementioned law enforcement officials and a separate law enforcement official.
When reached for comment, an eBay spokesperson said that “while we cannot comment on individual users' activities, when contacted by law enforcement agencies, we fully cooperate and work closely with them to assist with their investigations.”
The New York City Police Department, in coordination with federal authorities, have continued to talk to victims and witnesses of the subway shooting, have interviewed known family members of James, and have conducted search warrants as part of its investigative efforts in finding him, one of the officials told CNN.
Investigators also continue to comb through James’ social media footprint, the source said.
CNN's Richard Davis contributed to this report.