New details have emerged regarding the killing of a 27-year-old Somerville woman.

Maryrose Fealey was found stabbed to death outside her apartment complex on Jan. 30. Authorities say her former high school classmate, David Shroitman, was responsible for her death.

An affidavit released on Wednesday described the violent scene. It stated that Shroitman allegedly stabbed Fealey 37 times with a sharp object. Her car door was left open, and her belongings were found scattered on the ground.

Authorities say that it was by word-of-mouth that investigators heard about Shroitman. They then matched him on a dashboard camera video that showed him running up and down Cliff Street.

MORE: Man accused in Somerville stabbing had step-by-step plan detailing the murder, officials say

Police say they responded to a call of a suspicious person in Somerville, and this is where officers found Shroitman. They say he was seen cleaning his tan Toyota with bleach and was wearing clear latex gloves. Those gloves were also discovered with apparent bloodstains, police say.

The affidavit also stated that an inspection of Shroitman’s home revealed several bleach containers, blood detected in the entryway and bathroom, and clothes and sneakers matching the dash cam description.

Shroitman is also accused of writing out a manifesto laying out the slaying step by step.

Shroitman was charged with first-degree murder, third-degree possession of a weapon and hindering apprehension and fourth-degree tampering with physical evidence.

Fealey lived less than a mile from Shroitman 's residence but so far there has been nothing to link the two, other than their high school years.

Funeral services were held for Fealey on Wednesday morning.