Brooklyn

He’s nicknamed “Trigger” — and apparently for good reason.

Dexter “Trigger” Harris, 22, has been charged with bashing another man in the face with a .40 caliber handgun at Monday’s West Indian Day Parade before loading that weapon and indiscriminately firing it into a crowd of approximately 400 terrified revelers, sources said yesterday.

The shooting occurred just after 5 p.m. in front of 516 Eastern Parkway after Harris smashed Theron Bullock, 17, in the face with the gun, then loaded and fired it in a failed bid to hit Bullock.

Harris’ errant shot instead wounded innocent bystander Archibald Lindsay, 28, in the leg.

Two NYPD detectives in uniform — Ryner Fehrenbach and Hector Salas — arrested Harris after a short chase, sources said.

Harris has nine prior arrests, including at least two on gun charges, sources said.

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A 45-year-old woman was knifed to death and a 46-year-old man stabbed amid a drug dispute yesterday in East Flatbush, authorities said.

The victims were repeatedly stabbed in the chest in the 8:20 a.m. attack at Martense Street and Rogers Avenue, cops said.

The woman died at the scene and the man was listed in stable condition at Kings County Hospital.

No arrests have been made.

Manhattan

An Inwood man who attacked a plainclothes detective trying to bust a pot dealer died yesterday after being shot by the officer, sources said.

John Collado, 43, ran from his apartment at about 5 p.m. Tuesday as the cop was trying to cuff a drug dealer, law-enforcement sources said.

Collado came to the aid of the dealer and put the detective in a choke hold, cops said.

As the officer was losing consciousness, he pulled his service weapon and shot Collado once in the chest, cops said.

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Police are hunting two punks who mugged a 51-year-old man in Chinatown.

The suspects accosted the victim and rifled through his pockets at 9:45 a.m. on Aug. 30 on Allen Street near Grand Street.

The fiend ran off with an undisclosed sum of cash.

Queens

A pervert tried to sexually assault a young girl in a Richmond Hill park yesterday, cops said.

The 13-year-old victim was walking in Forest Park, near Myrtle Avenue and Park Lane South, at 10:05 a.m. when the attacker came at her from behind.

The sicko allegedly tried to pull down the teen’s pants but she fought him off and he fled.

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Two thugs are wanted for two gunpoint robberies, police said.

The suspects first struck on Aug. 26 at midnight when they stole a cellphone, jewelry and cash from a victim walking along Wetherole Street near 65th Road in Rego Park, police said.

On Aug. 28, at 3:10 p.m., they ambushed a man in Forest Hills, on Jewel Avenue near 110th Street, and yanked away his necklace.

The thugs fled in a white Cadillac.

Staten Island

Cops nabbed a young punk wanted for several violent muggings along the St. George waterfront last week, authorities said.

John Glick, 19, of Queens, allegedly targeted three men over two days on Bay Street near Richmond Terrace, not far from the swank Bay Street Landing high-rise.

On Aug. 31, Glick and a knife-wielding accomplice grabbed a cellphone and $200 from a victim at 6:30 p.m., then struck again at 9:45 p.m., snatching a BlackBerry smartphone and credit cards from another victim, court papers state.

The next day, at 3:20 p.m., Glick and his cohort snatched a bag and a portable DVD player from another man, cops said.

He was arrested Friday on multiple robbery charges and is being held on Rikers Island on $16,000 bail.

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A sadistic mother burned her 11-year-old boy with a butter knife in their Arden Heights home, authorities said.

Mervat Elhanafy, 39, allegedly heated up the knife and seared the boy’s legs and left arm in the brutal punishment she meted out at noon on Tuesday in their home on Ilyssa Way near Arthur Kill Road.

The child was rushed to the burn unit at Staten Island University Hospital, and Elhanafy was arrested on charges of assault, endangering the welfare of a child and weapons possession.