Four of the five people killed in a deadly shooting rampage in Denver were attacked at tattoo shops, raising questions about why they were targeted.

Five people were fatally shot in less than an hour Monday, and two others were wounded, including a police officer who shot and killed the suspected shooter after being hit.

Police say Lyndon James McLeod, 47, knew most of the people he shot in several locations around the metro area through business or personal relationships, but they were still investigating his motive. 

Gunman was on police radar

McLeod once owned a business in Denver called Flat Black Ink Corp.