Serial killer charged in 3 murders this week, including beloved retired Hamilton teacher [Video]

A 30-year-old Toronto woman has been charged in connection with three homicides this week in Toronto, Niagara Falls and Hamilton, two of which were randomly targeted.

The first incident happened shortly after 2 p.m. Tuesday at a home in the area of Keele Street and Dundas Street West in Toronto. Police say an unidentified woman believed to be in her 60s was found with trauma to her body. Investigators say the victim and suspect were known to each other.

The next day, police in the Niagara region were called just before 3 p.m. to John Allan Park in Niagara Falls following a report of an altercation between a woman and a man who was walking his dogs.

Officers arrived to find 47-year-old Lance Cunningham suffering from critical injuries. He died at the scene.

READ MORE:  ‘Unbelievable’: victim of daytime killing in Niagara Falls identified

Less than 24 hours later, Hamilton police responded around 12:30 p.m. to a parking lot on MacNab …