April Jean Sorensen, 27, was easy-going, athletic, and a hard-working student at the Rochester Community and Technical College, studying to become a dental hygienist...

On April 17, 2007, April's TV technician arrived at her home at 12:30 p.m., for a scheduled visit. He saw smoke coming from inside the house and immediately called 911.

When police and investigators arrived at the scene, they determined that the fire was not an accident.

After the fire was extinguished, police found April's body inside her bedroom. Autopsy reports confirmed she had been stabbed and strangled to death.

Sorensen worked at UPS Inc. in Rochester from 4 a.m. to 8 a.m. the morning she died, then attended class from 10 a.m. to 10:50 a.m., leaving a window of less than two hours from the time she returned home to the time she was murdered and her house was set on fire.

Sorensen and her husband, Joshua, had lived in the home for four years. He and the TV serviceman who reported the fire have both been cleared of the crime, authorities said. Josh Sorensen moved from Rochester after the murder.

Investigators have collected DNA evidence, but won't specify what or where it was found. There's been no match, pending further forensic technology.