Baltimore County police have arrested an 18-year-old Baltimore man suspected of robbing a teen of his watch at the Macy's in the White Marsh Mall. 

A man punched a 16-year-old boy in the face and stole his watch in the store's restroom at about 2:45 p.m. Saturday, according to the police report.

Based on the victim's description, police found and arrested Robert Glenn, 18, of the 3400 block of Cliffmont Avenue. Glenn was charged with robbery, theft less than $1,000 and second-degree assault, according to court records.