Police said they had no concrete motive for Ismaaiyl Brinsley's shooting of an ex-Miles Dixon/Metro

Investigators continued to learn more on Sunday about what drove an out-of-town man to shoot his ex-girlfriend and kill two policemen at point blank range on Saturday.

Police said they had no concrete motive for Ismaaiyl Brinsley's shooting of an ex-girlfriend in Baltimore, his coming to New York City and his eventual murder of officers Wenjian Liu and Rafael Ramos.

NYPD Chief of Detectives Robert Boyce told reporters on Sunday that investigators continued to pore over Brinsley’s Facebook and Instagram postings, as well as his Gmail account and two cell phones, one stolen from his ex-girlfriend who he shot.

“What we are seeing right now is anger against the government,” said NYPD Chief of Detectives Robert Boyce.


Boyce added that detectives already interviewed Brinsley’s family members in Brooklyn. His mother said she had not talked with him in a month, Boyce added, and added thatBrinsley had a violent childhood.

Boyce went on to say that family members explainedBrinsley, 28, was estranged and suicidal, having tried to hang himself last year.

With at least 19 prior arrests in Georgia and Ohio, Brinkley seemed to been despondent after shooting the former girlfriend. Boyce said Brinkley had called her mother to say the shooting was an accident and he hoped she would recover.

NYPD is still attempting to account for the 2 hours and 40 minutes leading up to the murders. Boyce said Brinsley arrived in New York City at around 10:50 a.m, and that police are using two Metrocards found on Brinsely's body after he allegedly killed himself on a subway platform to track his movements.

Brinkley had already ditched his own phone in Baltimore and had taken his ex-girlfriends, with authorities said was pining near Barclays Center in Brooklyn in the early afternoon.

Baltimore police notified the NYPD at about 2:45 p.m., Boyce said. A minute later Brinsley circled behind the parked patrol car and shot officers Ramos and Liu dead four times from the passenger-side window.

Boyce also told reporters detectives had tracked down tens of witnesses, including two whom told police Brinkley approached them, asked them to follow him on Instagram and then said, “Watch what I am going to do."

Shortly before, Brinsley is said to have posted a photo of the Taurus 9mm used to shoot both his ex-girlfriend and the officers with a message that read, "I'm putting wings on pigs today. They take 1 of ours…let's take 2 of theirs."

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