A 22-year-old man was fatally beaten in downtown Baltimore before 9 p.m. Friday, and police said Monday they have made four arrests. 

Jerod Gilmore was found lying in a large pool of blood at the intersection of North Calvert and East Baltimore streets at about 8:52 p.m. and was pronounced dead at Maryland Shock Trauma Center about 30 minutes later. An autopsy determined he had been beaten to death and stabbed several times, court records show.

According to charging documents, the assault was observed by officers monitoring surveillance cameras, who directed officers on the street to the suspects. The attack occurred one block south of the city courthouses and City Hall, and three blocks north of the Inner Harbor. 

Police said Friday night that the victim was in "serious condition" and did not disclose that he had died until Monday morning. 

Police did not give a motive. 

Four people were arrested and charged with first-degree murder:

-Darian Hyman, 20, of the 500 block of Benninghaus Rd

-Randolph McLean, 19, of the 5600 block of Govane Ave

-Royal Quinn, 18, of the 5300 block of Gwynn Oak Ave

-Ronald Carroll, 16, of the 3000 block of Wayne Ave

All were charged with first-degree murder and related charges, and are being held without bond. 

None have criminal records - as adults or juveniles. At a bail review hearing Monday afternoon, defense attorneys asked that the suspects be released because police charging documents did not specify anyone's level of involvement. 

Defense attorney Richard Woods said his client, Quinn, graduated from high school in June and is not involved in gangs or any other criminal activity. Ahmet Hisim, a public defender representing McLean, said the allegations were "ghastly," but said his client was only "ancillarily involved."

"My client was not the one who wielded the knife," Hisim said. 

The public defender representing Carroll said police documents "don't say who did what. I don't know if he was simply present, if he hit him, [or] what contact was made. I don't know what my client did."

District Court Judge Rachel E. Cogen said it was "sad" to see four people with no criminal records charged with murder, she said the nature of the charges required her to keep the defendants held without bail. 

A previous version of this story gave an incorrect age for the victim.

jfenton@baltsun.com