Tevin Williams

Jermaine Harris

As detectives work to solve the city’s first homicide of 2012, police said Sunday they will arrest two New Haven men in a killing from July.

Jermaine Harris, 25, and Tevin Williams, 22, who are already jailed on unrelated charges, will be charged by police in the July 31, 2011, killing of Daryl S. McIver Jr. of New Haven. McIver was shot several times outside an Ella Grasso Boulevard business on his 20th birthday.

Harris is being held at the Corrigan-Radgowski Correctional Center in Montville, facing a murder charge in the May 2010 killing of Edmund Jackson outside Humphrey’s East bar in New Haven.