Skip to content
personpersonChristopher DeCosteChristopher DeCosteDefense attorney for Katherine Magbanua in both the 2019 Garcia–Magbanua joint trial and the 2022 Magbanua retrial.← All People
Defense· Defense team (Magbanua)

Christopher DeCoste

Courtroom still of Christopher DeCoste.

Defense attorney for Katherine Magbanua in both the 2019 Garcia–Magbanua joint trial and the 2022 Magbanua retrial.

8,718 lines·223 proceedings·2 trials

About

DeCoste’s work helps identify the defense’s examination of technical, documentary, and cooperating-witness evidence for Katherine Magbanua across both trials.

Christopher DeCoste served as defense co-counsel for Katherine Magbanua in the Garcia–Magbanua 2019 Joint Trial and magbanua-retrial-2022. He conducted cross-examinations aimed at testing witness accounts, investigative documentation, technical evidence, and the inferences drawn from financial, employment, wiretap, and phone-record evidence. His questioning addressed Luis Rivera’s prior statements and cooperation-related evidence, the handling and content of investigative records, and the limits of using cell towers and call-detail records to infer a phone’s location. He also examined witnesses including Agent Patrick Sanford and Detective Craig Isom, conducted the direct examination of Jason Newlin, and in the 2019 joint trial delivered Magbanua’s closing argument under the reasonable-doubt standard.

Attorney insights (9)

Garcia–Magbanua

Focus

In closing, argued that the evidence established Markel's murder but not Magbanua's involvement, asking jurors to assess reasonable doubt separately as to her.

Supporting record (1)

Magbanua Retrial

Focus

Cross-examined Luis Rivera on prior statements, recollection, the claimed third Tallahassee trip, and Rivera's account of Katherine Magbanua's involvement.

Supporting record (1)
Focus

Cross-examined Christopher Corbitt on the limits of handset-location analysis and filtered call summaries; Defense Exhibits 10 through 17 were admitted.

Supporting record (1)
Credibility challenge

Questioned Luis Rivera about changed recollections, prior statements, the number of guns, the disposal of a gun, and an asserted alternative motive involving Sigfredo Garcia's jealousy.

Supporting record (1)
Credibility challenge

Tested whether cell-site and call-detail analysis established exact locations or supported the proposed travel and communication inferences.

Supporting record (1)

Trial Record (223)

GMGarcia–MagbanuaSep 26, 2019 – Oct 11, 2019

Defense co-counsel for Katherine Magbanua, DeCoste challenged the investigation's technical, financial, and witness evidence and delivered her closing argument.

Day 1

Day 2

Day 3

Day 4

Day 5

Day 6

Day 7

Day 8

Day 9

Day 10

ClosingClosing Argument - Christopher DeCosteChristopher DeCoste6highlights20lines spoken

Summary

DeCoste argued that the State had not proved Magbanua's involvement, attacked Rivera's credibility, and urged acquittal.

Highlights (6)

Quote“The less you know, the better.”— Christopher DeCosteDeCoste used this recorded statement as the organizing theme for his argument that Magbanua lacked knowledge of the alleged plot.Open in transcript →Watch this moment ▶
impeachmentDeCoste attacked Luis Rivera as the only witness he said directly implicated Magbanua, arguing that Rivera's account conflicted with phone, location, and school-record evidence and that his cooperation benefits gave him a motive to lie.Open in transcript →Watch this moment ▶
Show all 6 highlights

Day 11

KMMagbanua RetrialMay 18, 2022 – May 27, 2022

Serving as defense co-counsel, Christopher DeCoste examined witnesses and pursued challenges to Luis Rivera's prior accounts and to the limits of cell-site analysis.

Day 1

Day 2

Day 3

Day 4

Day 5

Day 6

Day 7

Day 8