It happened when the alleged suspect, 33-year-old Brian McCain, approached a 30-year-old female as she was walking to her vehicle after a dinner with friends.
Police say McCain demanded the woman give him her purse. The victim, fearful for her safety, gave him her purse.
A witness, a member of the Air Force, observed the incident and chased down the suspect, tackling him to the ground a short distance away.
That person was not hurt, and was able to recover the victim's property.
Dover Police arrested McCain a short time later near his home in the 100 block of West Loockerman Street.
He's facing a charge of Robbery in the 2nd Degree.
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