4:12 p.m. ET

Montgomery County police gave an update on the arrest of a federal officer in connection with fatal shootings of three people at three places in suburban Maryland in less than 24 hours.

Police Capt. Paul Starks explained how they apprehended 62-year-old Eulalio Tordil, an employee of the Federal Protective Service.

He described how Tordil ate lunch at a Boston Market and perused local businesses as police watched and waited to arrest him.

Watch the briefing above.

3:15 p.m. ET

Police announced Friday they caught a federal officer wanted in connection with three possibly related shootings in Maryland that killed a total of three people, including his estranged wife.

Montgomery County police said officers arrested 62-year-old Eulalio Tordil in Aspen Hill, who was wanted on a first-degree murder charge. Investigators said Tordil, an officer working for the Federal Protective Service, shot and killed his wife, a chemistry teacher, outside their children's school in Beltsville Thursday.

Then on Friday morning, two shootings unfolded -- one at a mall parking lot in Bethesda, and one outside a supermarket in nearby Aspen Hill roughly 30 minutes later. Police said it was possible Tordil may have been the gunman in those shootings as well. Beltsville, Bethesda and Aspen Hill are all Washington, DC suburbs.

A briefing by police is expected soon. Watch Shepard Smith and Lea Gabrielle report on the developments above, and stay tuned to Fox News Channel for the very latest. 

2:26 p.m. ET

Maryland police are investigating shootings at separate shopping centers in suburban Maryland, while also investigating if the shooter is connected to another killing on Thursday.

Police say a shooter hit two males and one female at the Westfield Montgomery Mall in Bethesda. One of the male victims died, police said, and the other is in critical condition.

About 20 minutes later, eight miles away, a woman was shot and killed at a Giant Food supermarket at the Aspen Hill Shopping Center in Silver Spring.

Police are still investigating whether the shootings are related. No arrests have been made. Authorities said they identified a person of interest, but didn't name him.

Meanwhile, police are still hunting for a Federal Protective Service employee identified late Thursday night as a Federal Protective Service employee, 62-year-old Eulalio Tordil, who they say shot and killed his estranged wife while she was at the school waiting to pick up her children.

They say he also shot another man found at the scene, who is expected to survive.

Police are expected to hold a briefing at 3 p.m. ET. Stay tuned to Fox News Channel for the latest updates.