BELTSVILLE, Md. (WJZ) — The search is on for the man police say shot and killed his estranged wife in the parking lot of a Prince George’s County high school on Thursday. A good Samaritan was also shot. He is expected to survive.

Police say Eulalio Tordil of Adelphi shot and killed his estranged wife, 44-year-old Gladys Tordil, in the rear parking lot of High Point High School in Beltsville. She was waiting to pick up her children from school.

The 62-year-old suspect is an employee of the Federal Protective Service.

At about 4:40 p.m. Thursday, investigators believe the suspect followed his estranged wife onto school property and confronted her. The two began to argue while Gladys Tordil remained in her SUV.

A good Samaritan saw what was happening and tried to help Gladys Tordil. That’s when police say the suspect pulled out a handgun and shot the man in his shoulder. He is expected to survive.

Police say the suspect then shot Gladys Tordil multiple times and fled the scene in a passenger vehicle. She died from her injuries.

The domestic incident was caught on school surveillance cameras. Police are now reviewing the footage.

Investigators say no children were involved or harmed, and that there was never an active shooter inside the school.

High Point was put on lockdown during the incident.

The lockdown has since been lifted. Students were able to leave through the cafeteria.

Police are asking anyone who sees Eulalio Tordil to call 911 or 1-866-411-TIPS immediately.

This is a developing story. Stay with WJZ and CBSBaltimore.com for the latest.