The Latest: Slain officer remembered as proud to protect Local resident Rea Lolley and family friends Dominick Duplessis, 10, and Addison Cummings, 4, arrive with flowers and balloons to place on a memorial for shooting victims at the B-Quik gas station on Monday, July 18, 2016, in Baton Rouge, La., a day after a shooting that killed and wounded multiple police officers. (Curtis Compton/Atlanta Journal-Constitution via AP)
The Latest: Slain officer remembered as proud to protect Millville, N.J. police chaplain Robert Ossler prays Monday, July 18, 2016, at a makeshift memorial at the fatal shooting scene in Baton Rouge, La., where several law enforcement officers were killed on Sunday. A former Marine set out to ambush police in Baton Rouge, authorities said Monday. (AP Photo/Gerald Herbert)
The Latest: Agents trying to learn where shooter got guns Shattered glass surrounds a bullet hole at Fitness Expo, Monday, July 18, 2016, at the fatal shooting scene in Baton Rouge, La., where several law enforcement officers were killed on Sunday. A former Marine set out to ambush police in Baton Rouge, authorities said Monday. (AP Photo/Gerald Herbert)
The Latest: Man arrested at gunman's last known address Balloons of support tied to mailboxes bounce in the wind across the street from the home of Baton Rouge Police officer Matthew Gerald in Denham Springs, La., Monday, July 18, 2016. Gerald was one of three law enforcement officers who were shot and killed Sunday. (AP Photo/Max Becherer)
The Latest: Louisiana governor orders flags to half-staff FBI patrol the perimeter of the crime scene in an armored vehicle where Baton Rouge police were shot, in Baton Rouge, La., Sunday, July 17, 2016. Multiple police officers were killed and wounded Sunday morning in a shooting near a gas station in Baton Rouge. (AP Photo/Gerald Herbert)
The Latest: Surveillance video shows man ambushing police This frame grab made from a video posted on YouTube on July 10, 2016, shows Gavin Eugene Long speaking as his online persona Cosmo Setepenra. Long killed law enforcement officers in Baton Rouge, La., on Sunday, July 17, 2016. (YouTube via AP)
The Latest: Slain officers lived in racially mixed suburb A memorial at the location where Baton Rouge police officers were killed and wounded continues to grow, Monday, July 18, 2016, in Baton Rouge, La. (Scott Clause/The Daily Advertiser via AP)
The Latest: FBI agent says our nation remains indivisible Millville, N.J., Police Chaplain Bob Ossler prays and weeps with a local resident as she places flowers on a memorial at the B-Quik gas station on Monday, July 18, 2016, in Baton Rouge, La. A former Marine set out to ambush police in Baton Rouge, authorities said Monday, a day after law enforcement officers were killed in the attack. (Curtis Compton/Atlanta Journal-Constitution via AP)
The Latest: Obama orders flags lowered for Baton Rouge Sheriff Sid Gautreaux explains the shooters actions during a news conference regarding the shooting of police officers in Baton Rouge, La., Monday, July 18, 2016. Multiple police officers were killed and wounded Sunday morning in a shooting near a gas station in Baton Rouge, less than two weeks after a black man was shot and killed by police, sparking nightly protests across the city. (Scott Clause/The Daily Advertiser via AP)
The Latest: Obama orders flags lowered for Baton Rouge Sheriff Sid Gautreaux explains shooters actions during a news conference regarding the shooting of police officers, in Baton Rouge, Monday, July 18, 2016. Multiple police officers were killed and wounded Sunday morning in a shooting near a gas station in Baton Rouge, less than two weeks after a black man was shot and killed by police, sparking nightly protests across the city. (Scott Clause/The Daily Advertiser via AP)
The Latest: Obama orders flags lowered for Baton Rouge Col. Mike Edmonson speaks during a news conference regarding the shooting of police officers, in Baton Rouge, La., Monday, July 18, 2016. Multiple police officers were killed and wounded Sunday morning in a shooting near a gas station in Baton Rouge, less than two weeks after a black man was shot and killed by police, sparking nightly protests across the city. (Scott Clause/The Daily Advertiser via AP)
The Latest: Obama orders flags lowered for Baton Rouge Baton Rouge Chief of Police Carl Dabadie, Jr. speaks during a news conference regarding the shooting of police officers, in Baton Rouge, La., Monday, July 18, 2016. Multiple police officers were killed and wounded Sunday morning in a shooting near a gas station in Baton Rouge, less than two weeks after a black man was shot and killed by police, sparking nightly protests across the city. (Scott Clause/The Daily Advertiser via AP)
The Latest: Obama orders flags lowered for Baton Rouge Pastor Robert Ossler, left, prays with people visiting a memorial Monday, July 18, 2016, in front of the B-Quick convenience store where law enforcement officers where engaged by a gunman and three were killed on Sunday in Baton Rouge, La. Ossler, a police chaplain from Millville New Jersey, was on his way home from comforting officers in Dallas when the shooting in Baton Rouge happened and he felt compelled to come to Baton Rouge. (AP Photo/Max Becherer)
The Latest: Obama orders flags lowered for Baton Rouge Sheriff Sid Gautreaux describes a wounded officers account of events during a news conference regarding the shooting of police officers, in Baton Rouge, La., Monday, July 18, 2016. Multiple police officers were killed and wounded Sunday morning in a shooting near a gas station in Baton Rouge, less than two weeks after a black man was shot and killed by police, sparking nightly protests across the city. (Scott Clause/The Daily Advertiser via AP)
The Latest: Obama orders flags lowered for Baton Rouge A memorial sign is posted Monday, July 18, 2016, in front of the B-Quick convenience store where law enforcement officers where engaged by a gunman and three were killed on Sunday in Baton Rouge, La. Pictured in the poster is, from left to right, Montreal Jackson, Matthew Gerald, both with the Baton Rouge Police Department and Brad Garafola of the East Baton Rouge Sheriff's Office. (AP Photo/Max Becherer)
The Latest: Obama orders flags lowered for Baton Rouge Map locates where three police officers were killed in Baton Rouge, Louisiana; 2c x 4 inches; 96.3 mm x 101 mm;
The Latest: Obama orders flags lowered for Baton Rouge Baton Rouge Mayor Kip Holden, left, and Louisiana Gov. John Bel Edwards, right, listen during a news conference Monday, July 18, 2016, in Baton Rouge, La. In a city already tense after the high-profile police shooting, multiple Baton Rouge police officers were killed and others wounded on Sunday. State police say the fatal shooting of the enforcement officers in was an ambush by a former Marine who "certainly was seeking out police." (Curtis Compton/Atlanta Journal-Constitution via AP)
The Latest: Obama orders flags lowered for Baton Rouge Col. Mike Edmonson speaks during a news conference Monday, July 18, 2016, in Baton Rouge, La. In a city already tense after the high-profile police shooting, multiple Baton Rouge police officers were killed and others wounded on Sunday. State police say the fatal shooting of the enforcement officers in was an ambush by a former Marine who "certainly was seeking out police." (Curtis Compton/Atlanta Journal-Constitution via AP)