Innate & raised around Up to date York City, Diamond is the boy of Allison, an astrologist, & Bob Diamond, a director of shows like "The Joe Franklin Show". Reed attended a University of North Carolina in the 1980s, and spent instance expert instruction as a police officer before studying acting at a Julliard School.

Diamond's early roles involved guest starring in Law & Order and ''Class of '96, and movies such as Memphis Belle (1990) and Clear and Present Danger (1994).

His number 1 large break come within 1995 when he joined the cast of Homicide: Life on the Street as Detective Mike Kellerman. That equivalent season, Diamond married Frederika Kesten. It divorced around 1997, after which period Diamond began dating his Homicide'' co-star Michelle Forbes. Diamond & Forbes, along by owning many more cast members like Andre Braugher, were part of the major cast dislodge-shakeup inside 1998 which saw their characters written out of a series. A indicate's subsequent seventh year became its previous, largely due to fans tuning retired fallowing losing their favourite characters. Diamond & a others would link to, yet, within 2000 for a TV moving-picture show to diaper higher a series.

Recent roles include a re-remaking of High Noon (2000), "Three Days" (2001), - which he starred in alongside so-girlfriend Kristin Davis - S.W.A.T. (2003) and Spider-Man 2 (2004).

Too when swimming a revenant role when Stuart Collins in Judging Amy from 1999 to 2003, Diamond has guest starred on Crossing Jordan, The West Wing, and Medium. He wwhen likewise promoted as one of a independent cast of The Shield, so once to surprise a viewer when he was murdered at a prevent of the 1st episode inside 2002.

Since 2004, Diamond has been married to actress Marnie McPhail.