Google Employee Murdered While Jogging, How They Found Her Killer Is Unbelievable...

Vanessa Marcotte was killed while out for a run in Massachusetts.

This undated driver license photo released by the Worcester County District Attorney's Office shows Vanessa Marcotte, of New York, whose body was found Sunday night, Aug. 7, 2016, in the woods about a half-mile from her mother's home in the town of Princeton, Mass., about 40 miles west of Boston.

State Police walk down the street after searching through the woods for evidence after a woman visiting her mother was found slain

Mass. Police found the body of Vanessa Marcotte on Sunday night about a half-mile from her mother's home, Worcester District Attorney Joseph Early Jr. said.

She was visiting from New York City and was reported missing Sunday after she didn't return home.

State Police search the woods for evidence after a woman visiting her mother was found slain

Vanessa Marcotte, 27, a Google employee

She lived in New York, was found dead in a wooded area about a half-mile from her mother's Princeton, Mass. home.

Pall Bearers the casket of Vanessa Marcotte into Our Lady of the Lake Roman Catholic church for a funeral service

She worked for Google in New York City, was killed Aug. 7 while out running near her mother's Massachusetts home.

Mourners watch during the graveside service for Vanessa Marcotte at Woodside Cemetery Tuesday

Investigators have received more than 600 tips, but no arrests have been announced.

The funeral procession for Vanessa Marcotte makes its way ip Main Street

They say her male assailant may have suffered cuts, scratches and bruises from a struggle.

Mourners embrace after a vigil for Vanessa Marcotte

A 27-year-old Google account manager, was found dead Sunday night hours after she went for a run near her mother's home in Princeton, a rural town of 3,500 residents about 40 miles west of Boston.

Mourners leave the church after a vigil for Vanessa Marcotte

Authorities urged residents in the area to remain vigilant and reiterated a call for the public's help.

A rural town of 3,500 residents about 40 miles west of Boston.

Volunteer fire department personnel stand outside the church during the vigil for Vanessa Marcotte

Worcester County District Attorney Joseph Early Jr. speaks to media outside the police department in Princeton, Mass.

Authorities said DNA evidence and an attentive state trooper helped find Angelo Colon-Ortiz, who authorities believe killed the New York City woman in 2016, who was out jogging near her mother's Massachusetts home.

Bystanders listen to Worcester County District Attorney Joseph Early Jr. speak to media outside the police department.

Police said throughout the investigation they believed Marcotte fought her attacker and the suspect had scratches on his face, neck and arms.

On Saturday, Early said DNA taken from Marcotte’s hands during an autopsy helped solve the case. The DNA was used to help create a profile of a suspect, which was released two months ago.

It also matched the DNA of 31-year-old Angelo Colon-Ortiz, who lives in nearby Worcester and who police believe was working in the area at the time of Marcotte’s attack.