Marcio Jose Sanchez/AP File PhotoSan Francisco 49ers defensive tackle Justin Smith (94) smiles during the second half of an NFL football game against the Arizona Cardinals in Santa Clara

Marcio Jose Sanchez/AP File PhotoSan Francisco 49ers defensive tackle Justin Smith (94) smiles during the second half of an NFL football game against the Arizona Cardinals in Santa Clara

Police announce arrest in Hayes Valley stabbing death

Police made an arrest in the Hayes Valley stabbing death of 20-year-old San Francisco resident Malcolm Armstrong, who was discovered by police in the 200 block of Haight Street about 4:06 a.m. Nov. 13.

Johnathan Dean, 24, of San Francisco was arrested in connection with Armstrong’s death and booked into County Jail on a homicide charge and for an unrelated warrant, Officer Gordon Shyy said.

Armstrong reportedly had sustained a laceration to his throat and a stab wound to the chest.

He was hospitalized in critical condition and died the next day.

There have been 35 homicides in The City so far this year.

Dean was arraigned Thursday and pleaded not guilty, Assistant District Attorney Alex Bastian said.

He remains jailed on $2 million bail.

Dean is scheduled to return to court Jan. 5.Bay Area NewsCrimeCrime & CourtsJohnathan DeanMalcolm ArmstrongSan Francisco Police Department

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