Nassau County police believe 29-year-old David Graf's bank robbery spree started on March 21.
Since then, detectives say Graf and his girlfriend, 26-year-old Lauren Becker, have targeted several banks in Nassau county.
Graf is also accused of stealing more than $1,200 from his 90-year-old grandmother.
Separately, police are still hunting for a man wanted in two robberies within the last week in Cedarhurst and Hewlett. They say he is considered armed and dangerous.
NEW YORK AND TRI-STATE AREA NEWS