Officers shot and killed in Baton Rouge, La.

The Arline Highway roadside memorial for the slain officers has become a focus for public grief.

The roadside memorial.

Signs adorn the roadside memorial.

Surrounded by members of the Baton Rouge community, Methodist pastor Colleen Bookter holds a sign that says UNITE during a vigil on the LSU campus Wednesday.

A supporter hugs a Baton Rouge police officer after a rally that included hundreds of motorcyclists.

Baton Rouge Police Officer Lorenzo Coleman is greeted by biker Fowler Montgomery with In The Wind Ministries after a rally with nearly 400 motorcycle riders from various local clubs who rode to police headquarters to show thier support.

Nearly 400 motorcycle riders from various local clubs rally in support of the Baton Rouge police department.

Baton Rouge Police Officers hug each other during a rally with nearly 400 motorcycle riders from various local clubs who rode to police headquarters to show thier support.

Nearly 400 motorcycle riders from various local clubs rally in support of the Baton Rouge police department. The riders stood with police officers and bowed their heads together in prayer.

Mourners hug after praying in front of the roadside memorial for the three slain police officers on Airline Highway in Baton Rouge, La.

While a small group of people prays next to a memorial on Airline Highway in Baton Rouge, La., residents are anxious about the future of their community after the recent police shooting of Alton Sterling and a gunman’s ambush that killed three police officers.

A small group prays together in a circle in front of the roadside memorial for the three slain police officers on Airline Highway in Baton Rouge, La.

A roadside memorial includes a sign with photos of Montrell Jackson, from left, Matthew Gerald and Brad Garafola, the three police officers killed in the line of duty in Baton Rouge, La.

New signs have sprung up along Airline Highway at the memorial for the three slain Baton Rouge, La., police officers.

The Louisiana State Police continue their investigation into the shooting deaths of three police officers in Baton Rouge in the parking lot of the car wash along Airline Highway.

Dechia Gerald, widow of slain Baton Rouge Police Officer Matthew Gerald, weeps while she cradles her two daughters on her lap during a candlelight vigil at the Healing Place Church.

A candlelight vigil is held for slain Officer Matthew Gerald at the Healing Place Church in Baton Rouge.

Residents of Baton Rouge, La., at a roadside memorial for the three police officers killed in an ambush Sunday.

Baton Rouge, La., residents take photos with their fists raised in front of a mural of Alton Sterling, who was killed by police in early July.

A mural of Alton Sterling on North Foster Road in Baton Rouge, La., near the site that he was killed by police.

Members of the public pay their respects to three slain officers in Baton Rouge, La., at a roadside memorial along Airline Highway, in front of the gas station and car wash where the ambush took place.

Robert Ossler, center, a police chaplain from Millville, N.J., who had come for support, comforts people July 18 at a memorial for three police officers killed in an ambush attack in Baton Rouge, La.

Baton Rouge, La., resident Ching Mei Lee weeps July 18 as she leaves flowers and a card for three slain police officers at a roadside memorial near where they were ambushed.

A woman pays respects to three slain Baton Rouge, La., police officers at a roadside memorial on July 18.

Three wooden crosses are tied to a roadside memorial on July 18, near where three Baton Rouge, La., police officers were slain.

Police officers near the scene of where three officers were killed Sunday morning in Baton Rouge, La.

Baton Rouge Police Officer Markell Morris with flowers and a Superman action figure that someone left at Our Lady of the Lake Hospital.

Police guard the emergency room entrance of Our Lady of the Lake Regional Medical Center, where officers injured in a shooting were being treated.

An East Baton Rouge police officer patrols Airline Highway after three officers were shot to death Sunday morning.

Baton Rouge police stop a car and direct the driver to show his hands on Airline Highway after he came from the direction of a shooting in which three officers died on Sunday. The driver’s car was searched, his identification checked and he was allowed to continue.

A law enforcement officer patrols Airline Highway in Baton Rouge, La., after three officers were shot to death Sunday morning.

Baton Rouge police officers work a roadblock at Old Hammond Highway and Tara Boulevard after multiple law enforcement officers were shot on Sunday in Baton Rouge, La.

Authorities talk to the driver of a car close to where several law enforcement officers were shot while on duty less than a mile from Baton Rouge Police Headquarters on Sunday.

Authorities block Airline Highway in Baton Rouge, La., after six law enforcement officers were shot on Sunday morning.

Law enforcement officials block Airline Highway after officers were shot.