Wicked Local Brookline reports [2] the local constabulary showed up at the 1154 Boylston St. Starbucks on Saturday when an employee found a gun in the restroom:
The gun belonged to the cafe's owner, who accidentally left it there.
Via Boston Restaurant Talk [3].
Links:
[1] http://www.universalhub.com/users/adamg
[2] http://www.wickedlocal.com/brookline/news/x848529296/Brookline-incident-reports-Jan-4-6
[3] http://bostonrestaurants.blogspot.com/2013/01/strange-days-in-brookline.html
[4] http://www.universalhub.com/brookline