Police say Malpeso's assailant, in contrast, was caught in the act.
Deng quickly decked the assailant, achieving her own bit of YouTube immortality.
The rationale in those cases, he said, is that DNA should be used to identify the assailant.
1530s, from French assailant, noun use of present participle of assailir (see assail). Earlier in same sense was assailer (c.1400).