On Sept. 5 at approximately 3:59 p.m., Calvert County Sheriff’s Office Patrol units were dispatched to a serious personal injury crash on Maryland Route 231 near Heather Road in Prince Frederick. 

Upon arrival units observed a 2009 Chevrolet Silverado and a 2003 GMC Envoy with heavy front end damage. It was evident the vehicles had been involved in a head on offset collision.  The passenger compartment of the GMC Envoy was severely compromised during the collision. There were two people in the Envoy and one in the Silverado.  

Due to the extent of the driver of the Envoy’s injuries, Patrol Units called for the Crash Reconstruction Team to respond to assist with the investigation. Members from the Prince Frederick Volunteer Fire Department and Rescue Squad, the Huntingtown Volunteer Fire Department and Calvert Advanced Life Support responded to the scene and extricated the patients from both vehicles. 

The driver of the Envoy was severely injured during the collision and was transported to Calvert Memorial Hospital where he was pronounced deceased by the emergency room doctor.  The deceased was identified as Peter Schroeder, 59, of Chesapeake Beach. The front seat passenger of the Envoy was the wife of the deceased, Mary Schroeder, 54, also of Chesapeake Beach.  Mary Schroeder was transported to the Medstar trauma center in Washington DC via MSP helicopter where she is listed in serious but stable condition.

The driver of the Silverado was identified as Robert Rambo, 57, of Prince Frederick. Rambo was transported via MSP helicopter to Medstar trauma center in Washington DC where he is listed in stable condition.
Preliminary investigation by the Crash Reconstruction Team revealed the Chevrolet Silverado operated by Rambo was travelling westbound along Maryland Route 231 when it crossed the double yellow center line and drove onto the shoulder. The GMC Envoy was travelling eastbound on Rt. 231. The operator of the Envoy drove onto the eastbound shoulder in an effort to avoid being struck by the Chevrolet Silverado. The Chevrolet Silverado struck the Envoy on the eastbound shoulder, pushing the Envoy backwards, and destroyed the Envoy’s passenger compartment.  The Crash Reconstruction Team members gathered all pertinent evidence from the scene and documented their findings.

The Patrol Units on scene detected the odor of an alcoholic beverage emitting from the passenger compartment of Rambo’s vehicle. Deputies responded to Medstar in Washington DC where a blood draw was administered to determine blood alcohol content.  It is believed alcohol and driver error are the major contributing factors in this crash.

If you witnessed this crash or the series of events that led up to it please contact Dfc. Jeff Hardesty of the Calvert County Sheriff’s Office Crash Reconstruction Team. Hardesty can be reached at 410-535-2800 or email him at hardesje@co.cal.md.us.

UPDATE 6:20 p.m.

Route 231 in Calvert County has been reopened.

UPDATE 5 p.m.

Barstow, MD – Police and emergency crews remain at the scene of a two-vehicle collision on Route 231 near Williams Road in Barstow. Three people were reported to be seriously injured. At least two of the injured were reportedly flown to a Washington, DC-area hospital.

Reports from the scene indicate the Calvert County Sheriff’s Department is conducting an accident reconstruction.

None of the injured have been identified

The Maryland State Highway Administration is at the scene. Motorists headed west on Route 231 via Route 2/4 are being directed to Prince Frederick Boulevard.

Eastbound motorists entering Calvert from Charles County on Route 231 should either use Sixes Road or Barstow Road.

No further information on the accident, which occurred shortly before 4 p.m., Saturday, Sept. 5 is available at this time.


UPDATE – 4:33 p.m.

The Prince Frederick Volunteer Fire Department (Company 2) has confirmed that two motorists injured in the crash at the Route 231 – Williams Road intersection are being flown to a Washington, DC trauma center. A third injured motorist was transported to Calvert Memorial Hospital.

Motorists should avoid Route 231 in Calvert County until further notice.


UPDATE – 4:26 p.m.

Emergency crews are at the scene of a serious two-vehicle collision on Route 231 and Williams Road in the Prince Frederick-Barstow area. Two motorists were reportedly trapped in the vehicles. 

A Maryland State Police helicopter is landing to transport one of the injured to a Washington, DC area trauma facility. 

More details as they become available.

Motorists should avoid the area until further notice.


Prince Frederick, MD – The Prince Frederick Volunteer Fire Department reports crews are at the scene of a two-vehicle collision on Hallowing Point Road at Williams Road in Prince Frederick. the collision occurred shortly before 4 p.m.

Responders at the scene report motorists are trapped in both vehicles. Three helicopters have been requested.

More as details become available.