April Sorensen's violent death shocked the quiet northwest area of Rochester where she lived. In the months following her death, police have canvassed her neighborhood several times and spoken with over 300 people.
Both her husband and the repairman who found her have been ruled out as suspects.
Rochester police Captain Brian Winters says police don't believe Sorensen was targeted.
"I cannot say that this is the first violent offense that this person committed. I can certainly say that this appears to be a crime without motive.That certainly it resulted in a significant amount of violence," says Captain Winters.
Police worked with the FBI to develop a profile of the offender.
Captain Winters says it's safe to assume the attacker was a single male whom likely blends into residential neighborhoods easily without raising suspicion. Winters says evidence indicates the offender was comfortable being in a stranger's home uninivited. That means he likely had burgled or stolen property from other homes.
"We're dealing with an individual who is impulsive, who has a sense of entitlement," Winters adds.
Police believe the offender may have changed his appearance and behavior shortly after the crime on April 17th.
Winters says investigators have collected DNA evidence but won't be more specific. He will say police don't have a match yet. He says he's hopeful new forensic technology will help the case.
"We have to wait for technology to catch up to the evidence that we've collected and apply new technologies as they become available. Databases are formulated based on past technologies," explains Winters.
Winters says he's confident the forensic evidence will eventually net results. In the meantime, he hopes information about the suspect will prompt residents to remember something they noticed earlier this year and call police. A $100,000 reward is offered for information leading to the arrest and conviction of the killer.