Washington ( CNN ) -- A Maryland man accused of making threats against his workplace and who had a large cache of legally owned weapons was charged Wednesday with a misdemeanor , according to state officials . Neil Prescott , 28 , has been charged with misuse of a telephone and will be formally arrested once he is released from a hospital , where he 's been undergoing a court-ordered mental evaluation . Prescott was taken into custody early Friday morning and a search of his home revealed about 25 weapons , including hand guns and assault rifles , along with 40 large steel boxes of assorted ammunition , officials said . Maryland man who called himself 'joker ' taken into custody . Angela Alsobrooks , the state 's attorney for Prince George 's County , said that although Prescott allegedly made serious threats , it was not possible to bring felony charges . `` Maryland does not have a statute on the books that makes it expressly illegal for a person to communicate generalized threats over the telephone , '' said Alsobrooks . She said Maryland should have a stronger law about such threats and that she would lobby for one . Alsobrooks also said no weapons charges could be brought because Prescott owns his guns legally . Prescott worked as a subcontractor for Pitney Bowes and was in the process of being fired . On July 23 , he was on the phone with a supervisor and allegedly said several times , `` I am a joker . I 'm going to load my guns and blow everybody up , '' according to local police . Police officials said they took the threats seriously and were sensitive to the use of the word 'joker ' in the aftermath of the July 20 mass shooting at an Aurora , Colorado , movie complex showing the latest Batman movie , `` The Dark Knight Rises . '' The Joker was the villain in a previous film in the series and also appears in the comic book series that inspired the films . Suspect James Holmes was arrested in the Aurora shootings and charged with murdering 12 people and wounding dozens more . Alsobrooks said that Prescott is still hospitalized in Maryland . If convicted on the misdemeanor charge , he faces a maximum sentence of three years in jail , a fine of $ 500 or both . In a Friday news conference , police also revealed that when they interviewed Prescott on Thursday , he was wearing a T-shirt saying , `` Guns do n't kill people . I do . '' Later that day , a judge issued an order for Prescott to be hospitalized for evaluation . Analysis : Fewer U.S. gun owners own more guns . Democrats propose limits on online ammo sales . CNN 's Ted Metzger contributed to this report .
State 's attorney for Prince George 's County says felony charges not possible . Angela Alsobrooks urges stronger threat laws in Maryland . Comment: Prescott is in a hospital undergoing mental evaluation .