Detectives are asking anyone who recognises a woman shown on hospital CCTV footage to call Surrey Police on 101, quoting the reference RM/13/4481 or call Crimestoppers anonymously on 0800 555 111.
Police want to speak to her in connection with a number of thefts from elderly and vulnerable patients.
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Police arrived at the 73-year-old's home after Alfie chased a delivery man.
Officers believe the three assaults are linked and are appealing for information about the suspect.
Nine addresses in Lewisham were searched and 13 arrests made early on Tuesday morning in a planned, intelligence-led operation.