Police in Upper Darby are warning residents to stay alert as a killer, they believe, is on the loose.
On Tuesday morning, officials shared images on social media of 31-year-old Yeicop Menjivar -- who also goes by Yieco Menjivar Pacheco -- as officers are seeking him in connection with, what they called a murder that allegedly happened during a domestic incident at a home on Kent Road in Upper Darby on Sunday.
Information posted Sunday on social media noted that the incident happened along the 200 block of Kent Road.
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On Tuesday, officials provided an update, noting that Menjivar is sought after he, allegedly, shot and killed Kenito Montoya, 24, who they said was shot and killed while he was protecting his sister.
According to police, the incident happened when Menjivar showed up at the Montoya family home, at about 2 a.m. on Sunday.
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Everyone was asleep at the time, said Tim Bernhardt, superintendent of the Upper Darby Police Department.
"He was there to speak to his ex-girlfriend," Bernhardt told NBC10's Leah Uko. "His ex-girlfriend got up and they proceeded to go to the first floor where they were engaged in a heated verbal argument.”
At some point during that argument, Bernhardt said, Montoya, who was the brother of Menjivar's ex-girlfriend, stepped into the room in an effort to de-escalate the argument. Instead, the police official said, Menjivar pulled out a gun and fired once, shooting Montoya in the head.
After the shooting, Montoya was taken to a nearby hospital where he was placed on life-support. However, he was taken off of the support on Tuesday. His father, Nahum Montoya, said the family is planning to donate his organs.
Police officials are still searching for Menjivar and have said that he is believed to be operating a blue or black Honda Civic and he should be considered armed an dangerous.
"If someone sees it, you’re not going to miss it," said Bernhardt. "It’s very loud. The loud exhaust and it’s dark blue with a black stripe. So it’s very distinctive.”
Anyone who may spot Menjivar is asked to call 9-1-1 immediately.
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