Arlington County officers responded to the store just after 11:35 a.m., after receiving a frantic 911 call about an assault in progress.
Police say a homeless man, 34-year-old Monbain Brown, had earlier in the day returned a $4,000 engagement ring after having a change of heart about the purchase. He returned shortly thereafter and “engaged in a verbal altercation with one of the workers behind the display case because the money had not showed up in his account yet,” according to ACPD spokesman Dustin Sternbeck.