Police may finally be getting some much-needed breaks in their investigation of the murder of officer Timothy Brenton.

SPD issued a bulletin to officers yesterday, giving a description of a suspicious vehicle spotted by detectives reviewing video footage captured by patrol cars responding to the drive-by shooting of officers Timothy Brenton and Britt Sweeney. 

However, the PI says:

Police don't know if that car was used in the fatal attack, and were not ready to call any vehicle a suspect vehicle, police spokesman Sean Whitcomb said.

King 5 reports that police found a backpack in downtown Seattle containing the names of officers, and the shifts they work.

The Seattle Times has also been aggressively pushing several stories about a possible connection between and last weekend's shooting and the torching of several police vehicles in a city maintenance yard in the International District:

A note threatening the lives of police officers was left Oct. 22 at the site where four Seattle police vehicles were set afire — nine days before Saturday night's fatal shooting of veteran officer Timothy Brenton in Leschi, according to sources familiar with both cases.

The arson at a city maintenance yard also involved the use of pipe bombs, a far more sophisticated attack than has been previously disclosed, the law enforcement sources said.

However, it's unclear whether the department believes these incidents are connected. At Sunday's police briefing, a reporter asked Assistant Chief Jim Pugel about the arson incident: "Three patrol cars were just burned, now you have a shooting of an officer…do you feel like the department's at war or under attack?"

While the reporter didn't specifically ask whether police believed the incident were related—and it's possible police may have found something to connect the fire and the shooting since last weekend—Pugel answered: "No, we don’t feel like we’re at war or under attack. We look at any indication, any previous event, any current event, quite frankly to determine if it could be connected, whether it was a week ago, a year ago, or hours ago."