Matthew Vincent Raymond was charged Saturday morning. Authorities are waiting for family members to be notified before releasing their names.
Sean Callahan says Robichaud, his cousin, is a father of three.
Officers Const. Robb Costello and Const. Sara Burns were identified as two of four victims of the shootings in New Brunswick's capital city on Friday morning.
Everett Chalmers Regional, "is now treating multiple victims of today's shooting", the local health authority said shortly before noon. They later said the suspect was being treated for serious injuries.
Callahan says Robichaud was a loving father and friend who played bass and sang in a few local bands, worked in autobody shops, enjoyed riding his Harley Davidson and was the kind of guy who was always there to lend a hand. "I am having a really hard time envisioning my life without him". Constable Burns had been on the force for two years, after serving as an auxiliary officer, and was married with three children.
Justin Mclean said there had been fights at the complex, but never like this.
Police also confirmed the identities of the two civilians killed, 42-year-old Donnie Robichaud and 32-year-old Bobbie Lee Wright.
Fredericton police have one person in custody and say there is no further threat to the public. "He wanted to have a true Irish Wake and wanted to have a party with lots of laughs and happy memories".
Police had earlier advised residents in the area to stay indoors, lock down their homes and not reveal their location or the location of police officers on social media.
"There were many officers in and around the building at that time, so when the call came in shots fired, officers jumped in a cruiser and attended the scene".
The other man and woman who were killed were not identified. They have not said whether he knew any of the deceased.
On Thursday, Ontario pledged more money for police and to keep people behind bars while they await trial on gun crime charges. "This morning, first responders rushed to the scene of danger".
Gaudet said police entered the shooter's apartment in the residential area of the city north of downtown, and arrested a 48-year-old man.
An officer said it was unclear how long the probe would take, and police have asked anyone who captured photos or video of the incident to come forward. AT to give the public an update on the case. "Thank you for ALL that you do!".
By Friday afternoon, a memorial of flowers and messages was growing in front of the Fredericton police station.
Another read: "Fredericton Police Force, your city has your back!"
"At times like this, we as a city and a province need to draw together for mutual support and comfort", said Anglican Bishop David Edwards in a statement.
They watched as the hospital's New Brunswick and Canadian flags were lowered to half-mast. "I was hoping for the two seconds that I was groggy that it was kids blowing off firecrackers", said MacCoubrey in a phone interview from inside his apartment, where he was sitting on the floor away from windows.
Four people, including two police officers, were shot to death in an apartment complex in the eastern Canadian city of Fredericton on Friday, and a suspect was taken into custody, authorities said. She also expressed gratitude for her force's swift response.
"On behalf of all New Brunswickers, I offer my condolences, thoughts and prayers to the victims and their families".
Police officers have not disclosed his motive.
Police are continuing their investigation.
"Then two more happened within the first three minutes".
"There is no greater gesture than to put oneself in harm's way to protect the life of another", Trudeau said. O'Brien called for the community to exercise patience as officials investigate what happened.