Robert McCool, 35, is a Florida resident with ties to the region, police in Prospect Park said Friday.
The indecent assault happened shortly after 4 p.m. on Monday, Aug. 3, at the store in the 700 block of Chester Pike.
Authorities said a 12-year-old girl entered the store with her 6-year-old sister when a man appeared to follow them inside.
Police said the suspect approached the girls twice.
The man brushed by them once and then, on the second occasion, inappropriately touched the 12-year-old, police said.
Anyone with information is asked to contact the Prospect Park Police Department at 610-534-2222 or call 911.