Jonathan Wiggs/Globe StaffThe Somerville Board of Aldermen unanimously approved a request Thursday by the mayor to posthumously name Sean Collier a Somerville police officer.
Collier, 26, was gunned down in his MIT police cruiser April 18, allegedly by the suspected Boston Marathon bombers. Collier had volunteered as the Somerville Police Department's webmaster up until his death, and had previously served in the city's auxiliary police and as a civilian in its IT department.
He aspired to become a Somerville police officer, and was in line to become one, according to Mayor Joseph Curtatone, who said Collier was supposed to be sworn in as a city officer on June 3.
"This person was exemplary as a public servant and a human being," Curtatone said Thursday. "... He would have been an outstanding member of the Somerville Police Department."
The city had arranged for Collier to attend police academy, and he graduated wearing the Somerville department's crest, his stepfather, Joseph Rogers, said Thursday. Collier paid his own way through the academy, and was focused on joining the police ranks in Somerville, Rogers said.
"He was going to do whatever it takes," he said. "I think the happiest day of Sean's life was when he graduated the police academy, and on his shoulder was a Somerville Police Department badge."
Curtatone submitted a request to the Board of Aldermen on Thursday, seeking a home rule petition to submit to the state Legislature. The aldermen unanimously approved the petition.
Somerville state representatives Tim Toomey and Denise Provost were both on hand to take the petition and deliver it to the Legislature.