Brooklyn

* Cops are asking for the public’s help finding the thug pictured above who is suspected of killing a 14-year-old boy in Bedford-Stuyvesant.

Marcus Cotton, 23, stands 5-foot-9 and weighs 175 pounds, and his last known address was on Gates Avenue near Marcus Garvey Boulevard in Bedford-Stuyvesant.

Cotton allegedly shot Mario Avilez once in the chest Monday At 9:30 p.m. at Kingston Avenue and Herkimer Street, cops said.

Mario was with friends when he was caught in the middle of a fight between two groups and hit by a stray bullet, sources said.

Staten Island

* A New Springville woman allegedly used her young granddaughter’s identity to open 14 different credit cards over four years, cops said.

Marie Livio, 73, began the scam when her granddaughter was 14 years old by applying for credit cards over the phone.

Livio charged about $3,000 in merchandise over four years. She was arrested Thursday and charged with forgery, identity theft, petit larceny and criminal possession of stolen property, said a spokesman for DA Daniel Donovan.

Bronx

* A 32-year-old woman was found dead in her Tremont apartment yesterday, and cops took her 64-year-old boyfriend into custody, police said.

Officers were summoned to quell a domestic dispute in the victim’s home on Morris Avenue near East 177th Street at around 11:30 a.m.

There they discovered the unconscious woman, whose name was withheld pending family notification, authorities said. Emergency workers pronounced her dead at the scene.

Sources said there were no gunshot or stab wounds on the body.

The suspect, whose name was not released, was arrested by cops at the scene and charges were pending.

Queens

* A customer was arrested after he punched a grocery clerk in the face in Far Rockaway, police said.

According to cops, Ismail Sanders, 36, went into the shop at Brookhaven Avenue and Beach 30th Street last week and punched the 19-year-old clerk in the face.

“Every time I go into that store, that guy makes fun of me, so I had to punch him,” said Sanders, according to court papers.

He was charged with assault and harassment.

* A man was caught after he broke into a Flushing bakery from where he planned to gain access to a money-wire-transfer shop next door, police said.

The suspect, Jiai Cheng, 36, was in the bakery on Main Street and 41st Avenue on Nov. 29, when an employee came by the store and spotted him wearing black gloves and holding a hammer and chisel.

Cheng had already chiseled two holes through a cinderblock wall to break into the MoneyGram shop next door, police said.

Cheng was charged with burglary, criminal mischief and criminal possession of burglary tools, according to a spokesman for DA Richard Brown.

Manhattan

* Cops are searching for a suspect who is wanted for robbing four Upper East Side grocery stores at gunpoint.

On Oct. 12, the suspect, in his 30s, standing 6 feet tall and weighing 200 pounds, robbed the Gourmet Plaza at East 88th Street and Second Avenue, where he threatened a clerk with a handgun wrapped in a towel, police said.

On Oct. 31, he went into the Clairemont Deli at East 82nd Street and First Avenue with a gun and demanded cash.

The following day, he robbed the Patrick Murphy Market at Madison Avenue and East 93rd Street.

On Nov. 14, he held up the 84th Street Corner Deli on Second Avenue.

*Two thieves followed a man into a Harlem building and robbed him at gunpoint, police said.

The suspects, both between 30 and 35 years old, confronted the 23-year-old victim as he walked into a building on West 140th Street near Lenox Avenue on Nov. 28, police said.

One of the men pulled a silver gun and demanded his wallet.