Martin "The Bow Tie Killer" Beck

Martin "The Bow Tie Killer" Beck is an escaped convict and wears a bow tie and says he is just misunderstood. He has cravings for a clown-themed snack called 'Smiley Pies', even though he(like Junior) hates clowns and also is the villain of the 1990 comedy hit,''Problem Child. ''

He was played by Michael Richards.

Junior becomes pen pals with Martin Beck,a notorious serial killer called the Bow Tie Killer. Big Ben ends up falling down the stairs, and the house catches on fire. Junior messes up a camping trip with the neighbors by urinating in the fire, and manipulating a practical joke played on the kids by their father, Roy. He makes Ben believe a bear is attacking the campground when it is really Roy in a bear suit. Ben hits Roy with a frying pan. Junior goes then terrorizes his neighbor's birthday party, after Lucy, the snobby birthday girl, bans him from the magic show. Junior however wants revenge and sneaks a lawn sprinkler in her room, cuts off another girl's ponytails with scissors, puts a frog in the punch bowl, replaces Pinata candy with pickles (including the Juice) and throws her presents in the pool and places fire crackers on her birthday cake making it blow up. Ben seeing Junior is upset gives him his most precious possession, a dried prune that belonged to his grandfather (he thought it resembled Roosevelt), telling him it signifies a bond between two people. Finally, he displays his effective but unethical method for winning in Little League where he strikes rival players in the crotch with a baseball bat. Ben is having serious doubts about Junior, and decides to take him back to the orphanage. However, upon hearing he was returned thirty times, he decides to keep and love him, something no one has ever done. However, Junior becomes upset that his parents were going to send him back and despite Ben stating that he will not, drives Flo's car into her father-in-law's store, and Ben's bank account is wiped out to pay for the damage. He is on the verge of cracking until Beck arrives at the house, posing as Junior's uncle, and decides to kidnap his faithful correspondent, along with Flo for ransom.

While Ben first sees this as good riddance to his browbeating wife and the trouble making Junior, he soon notices signs that Junior is not the monster he appeared. In his drawer is the prune carefully wrapped up and through a series of pictures he drew, he depicts Flo and Big Ben as deformed monsters with hostile surroundings, but depicted Ben as a happy person in a pleasant background, revealing that he really did value him as a father figure all along. Ben, realizing that Junior's behavior was simply a response to how he himself had been treated, and that it has simply been bad luck that he has had to deal with too many cruel and selfish people at such a young age, undertakes a rescue mission to get him back from Beck.

He then confronts his father (who is preparing to make a TV appearance for his mayoral campaign) to loan him the ransom money. When he callously refuses, Ben activates the camera that puts Big Ben unknowingly on live TV, where he ends up revealing his true nature on the news, even mooning the camera. Afterward, Ben steals his neighbor Roy's car and "Super Dad" hat and goes to rescue Junior.

Ben catches up with Beck and Junior at the circus. Junior is rescued after escaping from Beck through a trapeze act and calls Ben Dad for the first time. Beck drives away, but the Healys are now on his trail. After a collision, Flo (who was stuffed in a suitcase), is thrown into the air and lands in the back of a farm truck loaded with pigs. Beck is arrested, but while being put in the police car, he grabs an officers firearm and fires at them, hitting Ben in the chest. Thinking he has died, Junior apologizes for all the bad things he did and tells him he will never be naughty again and he loves him. Ben wakes up and tells Junior he loves him, too, and realizes the bullet ricocheted off his good-luck prune he was holding in his pocket.