A Medford man who allegedly shot and killed his friend on Easter Sunday was ordered held without bail today following his arraignment in Roxbury Municipal Court, officials said.

In court, Yerri Perez, 21, pleaded not guilty to charges of murder, unlawful possession of a firearm, and unlawful possession of ammunition for the March 31 shooting of Edward Villalona, 33, in Jamaica Plain.

Perez is due back in court Sept. 27, according to Suffolk District Attorney Daniel F. Conley’s office.

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“He is quite confident he will be exonerated,” said attorney John H. Miller Jr., who represented Perez.

Perez was apprehended Tuesday on a warrant based on a Boston police investigation in which detectives were allegedly able to identify him from surveillance images and cellphone records, the statement said.

According to Assistant District Attorney Daniel Mulhern, chief of the DA’s gang unit, Perez and Villalona had known each other and were friends. But during a confrontation just before 8:30 p.m. on Minden Street on March 31, Perez shot Villalona, the statement said.

Perez had been circling the area in a Ford Flex sport utility vehicle before the shooting, according to prosecutors. The next morning, a weapon was found in the playground of a day care center on Evergreen Street.

This investigation is ongoing and anyone with information should call Boston police homicide detectives at 617-343-4470.