Fresno police have identified the suspect in a series of store robberies thanks to a tip.
They say 32-year-old Willie Murphy should be considered armed and dangerous.
Police say Murphy is also a sex offender and a gang member and is the suspect in six separate armed robberies over the past two months.
In each case, there was only a lone female clerk working at the business when he robbed them.
Investigators say Murphy's M.O. was to pose as a customer and then when he got up to the counter, he would flash a gun in his waistband and take money from the register and personal property from the clerks.
Anyone with information about his whereabouts should call Fresno Police Department.
Copyright 2013 cbs47.tv Nexstar Broadcasting, All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.