Police discovered the decomposing bodies of Pedro Rodriguez, 28, and daughters Elsa, 9; Vanessa, 4; Carena, 16 months; and son Angel, 3, in the family's Hillcrest home.

The medical examiner's office ruled Pedro Rodriguez's death a suicide by hanging and the children's deaths as homicides. The three girls died of suffocation and their brother of head trauma. Police concluded that Pedro Rodriguez killed his children. The children's mother, Deysi Benitez, 25, went missing for nearly a year before her skeletal remains were discovered in a shallow grave near Emmitsburg on Feb. 29. Authorities believe the remains had been there for about a year.

A look back at the March 26, 2007 tragedy>>

Carol Danforth found the bodies of her two children in the woods off Barnesville Road in Boyds, Montgomery County. Maria Socorro Danforth, 2, and Carlos Diego Danforth, 1, had been hanged. Their father, Gerardo Roque, 35, had hanged himself nearby.

A look back at the April 3, 2007 tragedy>>

Frederick police found the body of Tina Marie Winkley, 31, who died from a blow to the head delivered by her husband, George Barry Winkley, 55, inside their home in a Dearbought subdivision. Frederick police said he used a household tool to murder his wife before overdosing on pain medications. Police ruled the case a murder-suicide.

A look back at the Oct. 11, 2007 tragedy>>

Sean Patrick McMahon, 30, hanged himself after he killed his wife inside their house in Lake Linganore.

McMahon poured a flammable liquid throughout the house at 6661 Harbor Light Way, including its basement, according to the Frederick County Sheriff's Office. Fire consumed the house.

Investigators found his body along with that of his wife, Marijke Sherwood McMahon, 26, inside the two-story house.

Officials said Marijke McMahon died from blunt trauma to the head and asphyxiation.

A look back at the Oct. 25, 2007 tragedy>>

Deputies discovered Pamela Lynn Hahn, 45, dead from gunshot wounds inside her house on Wood Street in Woodsboro.

The Frederick County grand jury indicted Charles Eugene Hahn, 57, on a first-degree murder charge in the shooting death of his wife.

The jurors also indicted Hahn on charges of first-degree sex offense and use of a handgun in a crime of violence.

Hahn is accused of shooting Pamela Hahn in the face as 911 dispatchers listened.
If convicted, Hahn faces the death penalty.

A look back at the Oct. 28, 2007 tragedy>>

David Peter Brockdorff, 40, of Urbana met his ex-wife Gail Pumphrey, 43, of Woodbine, in Unity Park near Laytonsville in Montgomery County about 4:30 p.m. Thanksgiving Day to exchange custody of their three children: David, 12; Megan, 10; and Brandon, 6.

During the custody exchange, Brockdorff shot Pumphrey and their children multiple times before taking his life, according to Montgomery County Police.

The Office of the Chief Medical Examiner in Baltimore said Brockdorff shot himself twice -- once in the chest and once in the head.

A look back at the Nov. 22, 2007 tragedy>>

Shooting death of police officer in Smithsburg, Washington County during a confrontation with a man who had just stabbed a woman during a domestic dispute. The suspect, Douglas W. Pryor, 29, of Smithsburg was then wounded in a shootout with police. Killed were Christopher S. Nicholson, 25, one of three officers on the Smithsburg police force, and Alison L. Munson, 31, of Halfway.

A look back at the Dec. 19, 2007 tragedy>>