Issue shrinking dev sql server DB's log file
Is the database in FULL or SIMPLE recovery mode?  

One thing that you could try doing is putting the database into SINGLE_USER mode and then shrinking the log file.  

I have had success with troublesome systems before by taking two log backups in quick succession and then shrinking the file.  Put all the commands in one script window and execute them to get the commands to execute in rapid succession. 

If the database is in FULL mode, then make sure you are taking regular LOG backups; this will keep the file smallish.