Police on Wednesday arrested a Suffolk man and charged him with the death of his 17-year-old girlfriend about 11 months ago.

William Daniel Conroy Jr., 20, is charged with second-degree murder, distribution of a schedule II drug and contributing to the delinquency of a minor in connection to the death of his girlfriend, which occurred on April 22, 2011, according to city spokeswoman Debbie George.

Police would not release the name of the victim because she was a minor, but her father identified her as Briley Marie Compton.

On April 22, emergency dispatch received a call in reference to a teen that was in cardiac arrest, George said. They went to the address in the 2700 block of Country Club Drive, in the Nansemond Shores neighborhood off Bennett’s Pasture Road, and found a 17-year-old female who was in distress, George said.

Police were told she had fallen from a boat in the backyard of her boyfriend’s residence, George said. She was transported to a hospital and pronounced dead there.

Tests on the body revealed that she died because of a combination of Coricidin, an over-the-counter cold medication, and a prescription narcotic, fentanyl, that was not prescribed for her, George said.

“Investigation revealed those items were given to her by her boyfriend,” George said.

Conroy was 19 at the time, George said.

“Police investigated the case and charged at a point when it was felt there was sufficient probable cause and evidence to support a charge and conviction,” George said.

The victim’s father, Brian Compton, said his daughter attended Woodrow Wilson High School in Portsmouth. She was a soccer player, loved to babysit and enjoyed helping to rehabilitate injured wildlife, he said.

“She was always trying to find things that were hurt or broken and trying to fix them,” Compton said. “She truly was a good person. She always had a smile and tried to cheer anyone up.”