Cpl. Ashley Bosch helps a young shopper select a present for a family member.

With sirens blasting and red and blue lights flashing, a law-enforcement caravan screamed down Routes 926 and 52 in Birmingham and Pennsbury Townships before heading south on Route 1 on Saturday. Its destination: the Walmart in East Marlborough. The attention-getting entourage began the 20-minute drive from downtown West Chester about 9 a.m., prompting people to ...