Both victims were found near a parked car with the engine still running.
Edward Joel Rosario-Jimenez, 23, was earlier charged with criminal homicide, attempted criminal homicide and aggravated assault, as well as a firearms offense, in the shooting. Witnesses told police they saw him open fire on Martinez and Law after some sort of argument.
The case remains under investigation.
Weather Forecast
1 of 2 people shot outside Lehigh Valley Walmart has died lehighvalleylive.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from lehighvalleylive.com Daily Mail and Mail on Sunday newspapers.