Suspected Shreveport cop killer in custody

3:30 p.m.

Shreveport police have Grover D. Cannon in custody. Media reports say Cannon was arrested in Shreveport not far from where Officer Thomas LaValley was fatally shot.

11:11 a.m.

The Jackson Police Department has been monitoring buses Thursday morning for a suspect that is considered armed and dangerous.

Wednesday night in Shreveport, La., a man identified as Grover Cannon allegedly shot to death Shreveport Police Officer Thomas LaValley.

Colendula Green, public information officer for the Jackson Police Department, said Shreveport police contacted JPD early Thursday morning to alert them about Grover Cannon. JPD was asked to monitor buses arriving from Shreveport.

“Once we were notified, we jumped on it immediately to assist,” Green said.

9:38 a.m.

Police have identified the suspect as Grover D. Cannon in connection with the fatal shooting of Shreveport, La. police officer Thomas LaValley Wednesday night. Cannon is also wanted in connection with a shooting that took place July 15.

Police in Jackson, Miss. closed off an area around Union Station in downtown and searched Greyhound buses arriving from Shreveport.

7 a.m.

Jackson police officers searched another Greyhound bus for a suspect sought in the fatal shooting of a Shreveport, La. officer.

6 a.m.

Jackson police closed off an area around a bus station Thursday morning and searched a Greyhound bus arriving from Shreveport.

Early a.m. Thursday update:

A Shreveport police officer answering a Wednesday night call was gunned down.

Agents from across the region descended on Queensborough after a 9:14 p.m. call became fatal. Midnight came and police had made no arrest despite more than 70 units called to the scene, backed by helicopters and drones.

Police came to Del Rio Street’s 3500 block on a suspicious person call. They expected an armed man inside a home threatening a family member.

When police arrived, someone opened fire. The officer was hit several times and was taken to University Health but died.

Police had not named their lost officer by 12:30 a.m., nor was the shooter captured.

Police locked down Queensborough with help from Bossier City police, sheriff’s deputies from Caddo, Bossier and DeSoto, the U.S. Marshals and the Louisiana State Police. They were all hunting whoever fired the killing shots.

Responding officers were intent on capture and clearly anguished. Police expected a long night.

The perimeter from the scene was one square mile wide. Bystanders were ushered out of the immediate area and into a supermarket parking lot. At 12:30 a.m. police were investigating a house Judson Street, but quickly confirmed the shooter was not inside the home.

Shortly after the inquiry on Judson Street, police began investigating an abandoned home on Lakeshore Drive near Jewella Avenue. Caddo Sheriff's Office's tactical force unit joined officer in front of the residence around 2 a.m.

With all eyes, lights and barrels pointed toward the dilapidated home, SWAT approached the front door and, following three verbal warnings, forced entry into the residence.

However, a full sweep of the home by SWAT and K9 units revealed the shooter was not inside. In just moments the tense scene broke and dispersed.

43 unit remained on the scene as of 4 a.m.

Late Wednesday update:

More than 70 law enforcement units responded after 9 p.m. to a call in Queensborough, where the incident occurred.

According to Shreveport Police Department spokesman Cpl. Marcus Hines, the department received a call at 9:14 p.m. about a suspicious person at the 3500 block of Del Rio Street. Hines said a man inside a home on the block was armed and making threats toward a family member.

Hines said when an officer arrived on scene, the subject opened fire.

The officer was taken to University Health in Shreveport with "critical injuries." The department confirmed to The Times just after midnight that the officer died from his wounds.

A perimeter has been set in the Queensborough neighborhood as officers from SPD, the Bossier City Police Department, the Caddo and Bossier sheriff's offices and the Louisiana state police attempted to find the gunman.

Helicopters also were being used in the manhunt.

Officials would not identify the officer and did not provide a detailed description of the gunman.

A Caddo Parish constable's office posted on its Facebook Wednesday night: "May God bless the family of the SPD officer that lost his life tonight serving our city. Please keep this officer's family in your prayers tonight as well as our local law enforcement. He died protecting us.''

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Shreveport Times reporter reporter Zach Beaird, Clarion-Ledger digital producer Harold Gater and Clarion-Ledger reporter Royce Swayze contributed to this report.