WHEN TRAGEDY HITS CLOSE TO HOME, IT BECOMES PERSONAL FOR LT. MASON AND THE DETECTIVES AS THEY INVESTIGATE THE SHOCKING MURDER OF AN ASSISTANT PROSECUTOR, ON ABC'S "DETROIT 1-8-7"

"Key to the City" - Happiness turns to horror during Longford's surprise retirement party when the squad learns that one of their own - assistant prosecutor Alice Williams - has been shot dead in a courthouse parking garage. For the victim's close friend, Lieutenant Mason, and the other stunned and enraged detectives, this crime is very personal as they cast a wide net to investigate anyone who could have had a motive. Suspects range from a criminal Williams had once put away to a former boyfriend who may have been stalking her. Closely guarded secrets start to emerge, including Williams' pact with a well-known reporter to build a case against a prominent figure with whom Fitch has tangled in the past. As the plot thickens, the body count rises, on "Detroit 1-8-7," TUESDAY, JANUARY 11 (10:00-11:00 p.m., ET) on the ABC Television Network.

"Detroit 1-8-7" stars Michael Imperioli as Detective Louis Fitch, James McDaniel as Sergeant Jesse Longford, Aisha Hinds as Lieutenant Maureen Mason, D.J. Cotrona as Detective John Stone, Jon Michael Hill as Detective Damon Washington, Shaun Majumder as Detective Vikram Mahajan, Natalie Martinez as Detective Ariana Sanchez and Erin Cummings as Dr. Abbey Ward.

Guest starring in "Key to the City" are Todd Stashwick as Henry Malloy, Rochelle Aytes as Alice Williams, Dov Tiefenbach as JJ Zagorski, Helena Mattsson as Anna Gabov, Erin Way as Wendy Chapin-Lomeister, Anslem Richardson as Eli Jones and Kara Zediker as Ms. Weatherly.

"Key to the City" story by Nikki Toscano, teleplay by Jason Richman and David Zabel, and directed by Seith Mann.

"Detroit 1-8-7" is broadcast in 720 Progressive (720P), ABC's selected HDTV format, with 5.1-channel surround sound. This program carries a TV-14,D,L,V parental guideline.

This episode of "Detroit 1-8-7" will be available on ABC.com the day after airing on the network for users to watch online. For more information on "Detroit 1-8-7" please visit ABC.com.