Former Eagles Safety Nate Allen -- Suing Police Over Mistaken Masturbation Arrest

Former Philadelphia Eagles safety Nate Allen isn't satisfied with having his name cleared after being accused of masturbating in public ... he plans on suing the cops that arrested him in the first place.

Allen's lawyer, Sawyer Smith, tells TMZ Sports ... Allen wants to make sure no other citizens go through the horrible experience he did, that's why he's chosen to sue.

Smith, who has sent a letter of intent to sue to Fort Myers Police says, "he's a fighter, and he's going to stand up for this community and its residents to have a fair shake when they interact with law enforcement."

Allen was cleared of any wrongdoing last month after he was arrested for allegedly driving around while pleasuring himself. Cops eventually realized they had the wrong man and let him go.