WASHINGTON, Pa.—Friends and family say a standout college running back killed in an apparent mugging was a positive person who tried to set a good example.

Twenty-one-year-old Washington & Jefferson College football player Timothy McNerney died from head trauma suffered when he was attacked on the street Thursday by a group of men in Washington, about 20 miles outside Pittsburgh.

Authorities are still investigating and Washington police Chief Robert Lemons says surveillance video shows several people in the area when the crime occurred.

On Tuesday, more than 300 friends and family remembered McNerney at a memorial service.

Twenty-two-year-old high school teammate Brandon Flick says McNerney was "the best of us." His cousin, 21-year-old Colin McNerney, says he looked for the positive in everything and always tried to set a good example.