Four additional people were charged today by Hamilton police in connection with the Nov. 30, 2013 murder of McMaster student Tyler Johnson.

The arrests followed raids of three Hamilton residences. Police have charged Hamiltonians Chad Davidson, 34, and Joshua Barreira, 25, with first degree murder. Police have yet to publicly identify two others, a man and a woman, who have been charged with being accessories after the fact.

These arrests took place several months after the initial arrest of 19-year-old Brandon Barreira on Dec. 11, 2013, who was charged with first degree murder.

Johnson, a 30-year-old fourth year engineering student, was shot in the chest in the early hours of Nov. 30 following an altercation outside of Vida La Pita and Tim Hortons on King Street West near Hess Village.

More to come.

A 32 year-old woman was mugged this morning at 7:38 a.m. while walking her dog along a trail near Haddon St. N and Marion St. Hamilton Police are looking for information and have a description of a male suspect.

The woman was approached aggressively by a white male 5’6’’ to 5’7’’ tall with a stocky build. The man was clean-shaven and wore track pants, a black hoodie and white running shoes.

The suspect grabbed the woman, threw her to the side of the trail and demanded cash from her. He threatened to kill her, but let her go. The victim ran northward to the Forsyth Ave. area, where she called the police.

The suspect was last seen running down the trail toward Marion St.

Detective Fletcher of the Hamilton Police Division One said the victim doesn’t appear to have sustained physical injuries. Fletcher said the investigation is still in the early stages, and it is uncertain whether or not this was an isolated incident.

The Hamilton Police encourage anyone with information to call 905-546-3821.